<%BANNER%>
Comparison of some characteristics of commercial frozen orange juice concentrates processed during the ... citrus seasons.
ALL VOLUMES CITATION SEARCH THUMBNAILS PAGE IMAGE ZOOMABLE
Full Citation
STANDARD VIEW MARC VIEW
Permanent Link: http://ufdc.ufl.edu/UF00066145/00001
 Material Information
Title: Comparison of some characteristics of commercial frozen orange juice concentrates processed during the ... citrus seasons.
Physical Description: Serial
Creation Date: 1956
 Subjects
Genre: serial   ( sobekcm )
 Record Information
Source Institution: University of Florida
Holding Location: University of Florida
Rights Management: All rights reserved by the source institution and holding location.
System ID: UF00066145:00001

Full Text


Citrus Station Mimeo Report 60-9
September 16, 1959

Comparison of Characteristics of Commercial Frozen Orange Concentrates
Processed during the 1956-57, 1957-58 and 1958-59 Citrus Seasons

F. W. Wenzel, C. D. Atkins, A. H. Rouse, R. L. Huggart, E. L. Moore,
R. W. Barron, M. D. Maraulja, E. C. Hill, G. H. Ezell and R. W. Olsen


Samples of frozen orange concentrate were collected semi-monthly from 23
plants in Florida during the 1958-59 citrus season. The 197 samples obtained
from December 1, 1958, to June 1, 1959, inclusively, were used to determined the
following characteristics of these products, (1) Brix value, (2) total acid,
(3) Brix-to-acid ratio, (4) pH, (5) recoverable oil, (6) ascorbic acid, (7) vis-
cosity, (8) color, (9) pulp, (10) water-insoluble solids, (11) flavonoids, (12)
pectinesterase activity, (13) water-soluble pectin, (14)clarification, (15)
gelation, (16) diacetyl values and (17) flavor. The results have been summarized
and are presented in the 38 tables that are included in this report. Similar data
obtained from the examination of samples collected during the 1956-57 and 1957-58
seasons are also included in Tables 1-21 for comparison purposes. Thus, informa-
tion is provided concerning the characteristics of frozen orange concentrate pro-
cessed during both a season before (1956-57) and one after (1958-59) the season
(1957-58) when fruit and trees were severely damaged because of the occurrence of
general freezes throughout the citrus area in Florida. It should also be pointed
out that during the latter part of the 1957-58 season some plants were using water
extracts of orange pulp in the production of frozen orange concentrate and during
the 1958-59 season a majority of the plants were using this "pulp washing" process.

The information included in Tables 1-21 also makes possible a comparison of
the characteristics of frozen orange concentrate for five citrus seasons, since
data for the 1953-54 and 1954-55 seasons were reported at the Seventh Annual Citrus
Processors' Meeting (Citrus Station Mimeo Report 57-7, October 11, 1956).

Included in this report are frequency distribution tables for the 17
characteristics of frozen orange concentrate listed above and also tables which
show the effect of the date of packing on (1) ascorbic acid (Table 7) and (2)
color, as indicated by Hunter Color Difference Meter "Rd", "a" and "b" values
(Tables 12 and 13). The effect of using different times and temperatures for
storage of orange concentrate to determine degree of clarification and gelation
is shown in Table 19.

To determine differences between the characteristics of frozen orange con-
centrate processed during the midseason and late season periods, Tables 21-38
were prepared. These frequency distribution tables show the percentage of the
number of samples for both the midseason and late season periods of 1958-59
which fell within different ranges of values for each characteristic. One
hundred and eighteen samples of midseason packs were collected from December 1,
1958 to March 15, 1959, inclusively, and 79 samples of late season packs from
April 1 to June 1, 1959, inclusively. The periods were separated on the basis


Florida Citrus Experiment Station
and Florida Citrus Commission,
Lake Alfred, Florida.
927 z 9/16/59 FWW






-2-


of the marked change in the color of the concentrate samples, collected on approxi-
mately April 1; this change in color is evident in the Hunter "a" values shown in
Table 12.

Discussion and interpretation in detail of the tabulated data in this report
is not presented at this time, but will be prepared for publication at a later
date.



Acknowledgments


The cooperation of all of the companies which supplied the 602 samples of
frozen orange concentrate, which were collected during the three seasons, was
appreciated. -

Thanks are extended to personnel of the U.S.D.A. Agricultural Marketing
Service, Winter Haven, Florida, for their time, efforts and assistance in ob-
taining samples from the concentrate plants.

The help and opinions of the taste panel made possible the evaluation of the
flavor of the frozen orange concentrates and their assistance is hereby acknow-
ledged. The members of the taste panel were M. D. Maraulja, R. W. Olsen, Roger
Patrick, R. W. Wolford, E. C. Hill, M. H. Dougherty, R. W. Barron, S. V. Ting,
R. R. McNary, S. K. Long and F. W. Wenzel.

























Florida Citrus Experiment Station
and Florida Citrus Commission,
Lake Alfred, Florida.
927 aa 9/16/59 FWW







Table 1. Frequency distribution of Brix values for samples of
commercial frozen concentrated orange juices collected from Florida
processing plants
Number of samples and season
Brix 212 193 197
value 1956-57 1957-58 1958-59
% of samples
Less than 40.90 0.0 1.6 0.0
40.90-41.40 1.5 5.2 8.6
41.50-41.70 3.3 24.8 16.2
41.8-42.0 42.4 40.4 47.2
42.10-42.3 41.0 19.7 23.4
42.40-42.60 7.5 4.7 3.6
More than 42.60 4.3 3.6 1.0


Table 2. Frequency distribution of total acid in samples of
commercial frozen concentrated orange juices collected from Florida
processing plants 1
Number of samples and season
Acid as 212 193 197
citric % 1956-57 1957-58 1958-59
% of samples
Less than 2.50 0.9 1.0 0.5
2.50-2.69 9.4 4.7 8.6
2.70-2.89 21.6 17.1 16.8
2.90-3.09 38.0 30.1 38.6
3.10-3.29 25.9 31.6 31.5
3.30-3.49 3.3 14.5 4.0
More than 3.49 0.9 1.0 0.0


SSamples collected semi-monthly from
inclusively, during each processing


December through June,
season.


Florida Citrus Experiment Station
and Florida Citrus Commission,
Lake Alfred, Florida.
927 9/16/59 RLH







Table 3. Frequency distribution of Brix-to-acid ratios in samples
of commercial frozen concentrated orange juices collected from Florida
processing plants 1
Number of samples and season
Brix-to-acid 212 193 197
ratio 1956-57 1957-58 1958-59
% of samples

Less than 12.0 0.9 1.5 0.0
12.0-12.9 7.1 22.3 10.7
13.0-13.9 38.7 39.4 42.6
14.0-14.9 34.0 23.8 29.9
15.0-15.9 11.3 10.4 11.2
16.0-16.9 7.1 2.1 5.1
More than 16.9 0.9 0.5 0.5


Table 4. Frequency distribution of pH in samples of commercial
frozen concentratedd orange juices collected from Florida processing
plants
Number of samples and season
pH of 212 193 197
concentrate 1956-57 1957-58 1958-59
% of samples

3.4 1.4 2.0 2.0
3.5 17.5 50.8 36.5
3.6 52.4 42.0 50.3
3.7 22.6 5.2 11.2
3.8 3.3 0.0 0.0
3.9 2.8 0.0 0.0

Samples collected eemd-monthly from December through June,
inclusively, during each processing season.


Florida Citrus Experiment Station
and Florida Citrus Commission,
Lake Alfred, Florida.
927 a 9/16/59 RLH






Table 5. Frequency distribution of recoverable oil in samples of
commercial frozen concentrated orange juices collected from Florida
processing plants 1
Recoverable oil Number of samples and season
Reconstituted 212 193 197
Concentrate juice 2 1956-57 1957-58 1958-59
ml./100g. % by volume % of samples

Trace-0.002 Trace-0.001 0.0 0.0 0.0
0.003-0.018 0.001-0.005 0.9 1.0 2.0
0.019-0.035 0.006-0.010 31.1 36.3 31.5
0.036-0.052 0.011-0.015 55.7 48.7 56.3
0.053-0.068 0.016-0.020 12.3 13.0 10.2
0.069-0.086 0.021-0.025 0.0 1.0 0.0


Table 6. Frequency distribution of ascorbic acid in samples of
commercial frozen concentrated orange juices collected from Florida
processing plants

Ascorbic acid Number of samples and season
Reconstituted 212 193 197
Concentrate juice 2 1956-57 1957-58 1958-59
mg./lOOg. mg./lOOml. %__ of samples
100-109 30-32 0.0 0.0 0.0
110-119 33-35 0.9 0.5 0.0
120-129 36-38 7.5 1.6 5.6
130-139 39-41 14.2 7.3 15.7
140-149 42-44 15.1 18.1 11.2
150-159 45-47 8.0 26.9 11.2
3.60-169 48-50 9.0 28.5 7.1
170-179 51-53 16.0 16.1 20.3
180-189 54.56 15.6 1.0 21.3
190-199 57-59 9.4 0.0 7.6
200-209 60-62 3.8 0.0 0.0
210-219 63-65 0.5 0.0 0.0


1 Samples collected semi-monthly from December
inclusively, during each processing season.
2 These values were calculated.


through June,


Florida Citrus Experiment Station
and Florida Citrus Commission,
Lake Alfred, Florida.
927 b 9/16/59 RLH








Table 7. Relationship of date of packing to average values for a corbic acid in
concentrated orange juices collected from Florida processing plants


samples of commercial frozen


___Ascorbic acid Ascorbic acid Ascorbic acid
1956-57 season 212 samples 1957-58 season 193 samples 1958-59 season 197 samples
Approx. Number Reconstituted Number Reconstituted Number Reconstituted
date j of Concentrateg juice2 of Concentrate juice2 of Concentrate juice2
packed samples mg./lOOg. mg./lOOml. samples mg./lOOg. mg./100lml. samples mg./lOOg. mg./lOOml.
12/1 1 187 56 4 I 172 51 2 184 55
12/15 8 186 55 15 | 169 50 13 177 53
1/1 16 191 57 17 164 49 17 183 54
1/15 21 191 57 22 161 48 22 182 54
2/1 23 182 54 22 164 49 23 182 54
2/15 20 179 53 19 165 49 21 178 53
3/1 15 170 50 8 158 47 15 168 50
3/15 10 167 50 11 160 48 5 160 48
4/1 5 161 48 14 154 46 6 150 45
4/15 12 146 43 17 151 45 15 148 44
5/1 20 144 43 19 146 43 22 141 42
5/15 21 139 41 16 138 41 22 138 41
6/1 21 136 40 9 136 40 14 131 39
6/15 19 132 39 -


I Samples collected
2 These values were


semi-monthly from December through June, inclusively, during
calculated.


each processing season.


Florida Citrus Experiment Station
and Florida Citrus Cormmission,
Lake Alfred, Florida
927 c 9/16/59 RLH







Table 8. Frequency distribution of apparent viscosities of commercial frozen concentrated orange
juices collected from Florida processing plants 1
Apparent viscosity at 300C.
Brookfield Number of samples Pipette Number of samples
viscometer and season and season
Cntipoises 178 185 189 Time in3 178 185 189
1956-578 1957-58 1958-59 seconds3 1956-57 1957-58 1958-59
% of samples % of samples

0- 249 0.0 0.0 1.1 Less than 10 0.0 1.6 0.0
250- 499 2.8 42.0 35.5 10-19 15.2 47.0 33.8
500- 749 26.4 33.5 42.3 20-29 45.0 34.1 37.0
750- 999 35.5 16.8 13.7 30-39 21.3 10.9 15.3
1000-1249 18.0 5.9 3.7 40-49 9.5 4.4 6.9
1250-1499 9.0 0.6 2.7 50-59 1.0 0.5 3.3
1500-1749 1.7 0.6 0.5 60-69 3.4 1.0 1.6
1750-1995 3.9 0.6 0.5 70-79 1.6 0.5 1.1
2000-2249 1.7 0.0 0.0 80-89 1.0 0.0 0.5
2250-2499 0.5 0.0 0.0 90-99 1.0 0.0 0.0
2500-2749 0.5 0.0 0.0 More than 99 1.0 0.0 0.5
________ _____ _____ ^_______ __ ____ ___ -- -- - --_ --- __


Samples collected semi-monthly from
season.


December through June, inclusively, during each processing


Each sample was thawed for 90 minutes in 3000. water bath; viscosity measured at 3000. with
concentrate in 6 oz. can, using Brookfield LVT viscometer, No. 2 spindle, 12 r.p.m. with
reading made after 1 minute
3 Time for flow of 150 ml. of concentrate from pipette with product at 300C.


Florida Citrus Experiment Station
and Florida Citrus Commission,
Lake Alfred, Florida.
927 1 9/16/59 GHE








Table 9. Frequency distribution of Hunter "Rf" values for samples of commercial frozen concentrated orange
juices collected from Florida processing plants
Concentrates Reconstituted juices
Hunter Color Number of samples and season Hunter Color Number of samples and season
Difference Meter 212 193 197 Difference Meter 212 193 197
Rd 1956-57 1957-58 1958-59 Rd 1956-57 1957-58 1958-59
% of samples % of samples

Less than 16.0 0.0 0.0 0.0 Less than 15.0 0.0 0.0 0.0
16.0-16.9 0.0 0.0 0.0 15.0-15.9 0.0 0.0 0.0
17.0-17.9 0.0 0.0 0.0 16.0-16.9 0.0 0.0 0.0
18.0-18.9 2.8 3.1 1.5 17.0-17.9 0.0 0.0 0.0
19.0-19.9 4.7 4.7 5.1 18.0-18.9 0.9 1.0 0.0
20.0-20.9 10.0 4.1 7.6 19.0-19.9 9.4 2.1 1.5
21.0-21.9 13.2 14.5 12.7 20.0-20.9 10.4 8.8 5.1
22.0-22.9 11.8 15.6 9.7 21.0-21.9 23.1 14.0 10.2
23.0-23.9 15.1 17.6 11.7 22.0-22.9 16.6 22.8 22.8
24.0-24.9 12.3 17.6 17.7 23.0-23.9 19.3 24.9 18.8
25.0-25.9 10.8 12.4 12.2 24.0-24.9 13.7 18.1 21.8
26.0-26.9 7.5 5.2 10.2 25.0-25.9 3.3 6.2 12.7
27.0-27.9 5.7 1.0 5.6 26.0-26.9 2.8 2.1 6.6
28.0-28.9 0.9 1.6 2.5 27.0-27.9 0.5 0.0 0.5
29.0-29.9 2.8 1.6 1.5
30.0-30.9 1.9 1.0 1.0
31.0-31.9 0.0 0.0 0.5
32.0-32.9 0.5 0.0 0.5
1 Samples collected semi-monthly from December through June, inclusively, during each processing season.


Florida Citrus Experiment Station
and Florida Citrus Commission,
Lake Alfred, Florida.
927 g 9/16/59 MDM








Table 10. Frequency distribution of Hunter "a" values for samples of commercial frozen concentrated orange
juices collected from Florida processing plants
___Concentrates ___Reconstituted juices
Hunter Color Number of samples and season Hunter Color Number of samples and season
Difference Meter 212 193 197 Difference Meter 212 193 197
a 1956-57 1957-58 1 1958-59 a 1956-57 1957-58 1958-59
% of samples % of samples
11.1-12.0 0.9 0.0 0.0 0.0 to -0.9 1.9 0.0 2.5
10.1-11.0 5.2 0.0 0.5 -1.0 to -1.9 8.5 2.6 9.1
9.1-10.0 8.0 j 0.5 4.1 -2.0 to -2.9 21.2 10.9 15.7
8.1- 9.0 18.8 2.1 12.2 -3.0 to -3.9 13.2 16.1 9.6
7.1- 8.0 11.8 9.8 15.2 -4.0 to -4.9 9.0 20.7 10.2
6.1- 7.0 4.3 13.5 8.6 -5.0 to -5.9 21.7 21.7 29.5
5.1- 6.0 9.4 13.0 4.6 -6.0 to -6.9 21.7 26.4 22.4
4.1- 5.0 17.0 21.2 11.2 Less than -6.9 2.8 1.6 1.0
3.1- 4.0 20.8 18.1 22.8
2.1- 3.0 3.8 13.5 19.3
1.1- 2.0 0.0 7.3 1.5
Less tian 1.1 0.0 1.0 0.0

1 Samples collected semi-monthly from December through June, inclusively, during each processing season.


Florida Citrus Experiment Station
and Florida Citrus Commission,
Lake Alfred, Florida.
927 h 9/16/59 MDM










Table 11. Frequency distribution of Hunter "b"
uicas collected from Florida processing plants 1


1 Samples collected semi-monthly


values for samples of commercial frozen concentrated orange


from December through June, inclusively, during each processing season.


Florida Citrus Experiment Station
and Florida Citrus Commission,
Lake Alfred, Florida.
927 i 9/16/59 MDM


Concentrates .. Reconstituted juices
Hunter Color Number of samples a.d season Hunter Color Number of samples and season
Difference Meter 212 193 197 Difference Meter 212 193 197
b 1956-57 1Q57-58 1958-59 b 1956-57 1957-58 1958-59
of samples______ of samples____.

More than 34.9 0.0 0.5 2.5 More than 30.9 0.0 0.0 8.6
34.0-34.9 0.5 2.1 13.7 30.0-30.9 0.9 8.8 22.3
33.0-33.9 8.0 18.1 25.4 29.0-29.9 12.3 32.6 28.3
32.0-32.9 24.1 37.3 38.6 28.0-28.9 46.7 45.1 32.0
31.0-31.9 36.8 27.5 17.8 27.0-27.9 35.4 11.4 8.1
30.0-30.9 23.1 11.4 2.0 26.0-26.9 4.7 2.1 1.0
29.0-29.9 6.6 2.6 0.0 25.0-25.9 0.0 0.0 0.0
28.0-28.9 0.9 0.5 0.0 Less than 25.0 0.0 0.0 0.0
27.0-27.9 0.0 0.0 0.0
Less than 27.0 0.0 0.0 0.0








Table 12. Relationship of
juices collected fran Florid
a


date of packing to average Hunter color values for commercial frozen concentrated orange
roessi lants+ 1


Hunter Color Difference Meter average values for concentrates
1956-57 season 212 samples 1957-58 season 193 samples 1958-59 season 197 samples
Approx. Number Kumber Number
date of Rd a b of Rd a b of Rd a b
packed samples samples samples
12/1 1 27.7 5.4 33.2 4 25.7 2.5 32.1 2 24.1 3.3 31.8
12/15 8 25.4 3.8 31.6 15 25.8 3.5 32.8 13 24.7 3.7 32.4
1/1 16 25.7 4.0 32.0 17 25.0 2.9 32.6 17 25.6 3.1 32.7
1/15 21 26.8 4.0 32.5 22 23.9 3.4 32.2 22 25.8 3.3 33.C
2/1 23 25.5 4.3 32.0 22 24.2 3.7 32.2 23 25.9 3.2 33.0
2/15 20 24.4 4.5 31.8 19 24.2 3.3 32.4 21 24.6 3.8 32.5
3/1 15 24.7 4.5 31.7 8 23.2 4.6 31.7 15 25.2 4.6 33.4
3/15 10 24.3 5.6 31.7 11 23.1 4.8 32.3 5 24.4 4.9 33.6
4/1 5 23.2 7.2 31.7 14 22.8 5.7 32.2 6 22.2 7.8 33.3
4/15 12 21.9 9.0 31.2 17 22.5 5.8 32.0 15 21.8 6.8 32.5
5/1 20 21.8 8.9 30.9 19 21.8 7.0 31.6 22 21.7 7.9 32.8
5/15 21 22.2 8.6 30.7 16 21.1 6.8 31.1 22 21.8 8.0 32.5
6/1 21 21.1 8.5 30.5 9 21.0 6.4 31.2 14 22.1 8.5 32.8
6/15 19 21.1 8.9 31.0 -

Samples collected semi-monthly from December through June, inclusively, during each processing season.


Florida Citrus Experiment Station
and Florida Citrus Commission,
Lake Alfred, Florida.
927 j 9/16/59 MDM


,,








Table 13. Relationship of date of packing to
juices collected from Florida processing plants I


average Hunter color values for commercial frozen concentrated orange


Hunter Color Difference Meter average values for reconstituted juices
1956-57 season 212 samples 1957-58 season 193 samples 1958-59 season 197 samples
Approx. Number Number Number
date of Rd a b of Rd a b of Rd a b
packed samples samples samples
12/1 1 23.7 -5.0 28.5 4 24.3 -5.9 27.8 2 24.2 -5.5 28.0
12/15 8 23.6 -6.2 28.0 15 23.9 -5.7 28.2 13 23.7 -5.5 28.1
1/1 16 23.9 -6.0 28.1 17 23.6 -6.0 28.2 17 24.8 -5.8 28.7
1/15 21 24.0 -6.1 28.3 22 23.3 -5.9 28.3 22 24.5 -6.0 28.7
2/1 23 23.7 -5.6 28.0 22 23.6 -5.7 28.4 23 24.6 -6.0 28.6
2/15 20 23.2 -5.8 27.8 19 23.8 -5.9 28.8 21 23.8 -5.6 28.5
3/1 15 23.3 -5.9 27.7 8 23.3 -5.5 29.0 15 24.4 -5.3 29.3
3/15 10 23.4 -4.8 28.3 11 23.2 -4.5 29.4 5 24.5 -4.8 30.1
4/1 5 22.1 -3.8 28.4 14 23.1 -3.9 29.8 6 22.9 -2.6 31.0
4/15 12 20.8 -2.5 28.2 17 22.5 -4.0 29.4 15 21.5 -4.0 29.7
5/1 20 21.1 -2.7 28.5 19 21.4 -2.8 29.0 22 22.3 -1.5 30.6
5/15 21 20.7 -2.9 28.2 16 21.2 -3.0 28.7 22 22.5 -2.6 30.4
6/1 21 20.8 -2.5 28.0 9 21.1 -3.4 28.4 14 22.0 -2.5 29.9
6/15 19 21.0 -1.9 28.5 -

Samples collected semi-monthly from December through June, inclusively, during each processing season.


Florida Citrus Experiment Station
and Florida Citrus Cormission,
Lake Alfred, Florida.
927 k 9/16/59 MDM







Table 14. Frequency distribution of pulp in samples of
commercial frozen concentrated orange juices collected from
Florida processing plants
Number of samples and season
Pulp2 212 193 197
% by volume 1956-57 1957-58 1958-59
% of samples
4.5 0.0 0.0 0.0
5.0 0.0 0.0 0.0
5.5 0.0 0.0 0.0
6.0 0.0 0.0 0.0
6.5 0.0 0.0 0.0
7.0 0.0 0.0 0.5
7.5 0.0 0.5 1.5
8.0 0.5 0.5 4.6
8.5 1.4 1.6 5.1
9.0 3.8 9.8 9.7
9.5 0.9 6.2 7.6
10.0 7.1 15.5 19.8
10.5 6.6 9.3 12.7
11.0 12.7 18.7 12.2
11.5 6.1 7.3 5.1

12.0 20.3 10.9 10.1
12.5 7.5 4.2 2.5
13.0 10.9 4.2 4.6
13.5 4.3 3.6 0.5
14.0 6.1 3.6 1.0

14.5 2.4 1.0 0.0
15.0 2.8 2.1 1.0
15.5 0.9 0.0 1.0
16.0 3.8 0.5 0.5
16.5 0.9 0.5 0.0
17.0 0.0 0.0 0.0
17.5 0.5 0.0 0.0
18.0 0.5 0.0 0.0

Samples collected semi-monthly from December through June,
inclusively, during each processing season.
2 Determined by centrifugal method; does not include floating
pulp.


Florida Citrus Experiment Station
and Florida Citrus Commission,
Lake Alfred, Florida.
927 d 9/16/59 CDA






Table 15. Frequency distribution of water-insoluble solids in
samples of commercial frozen concentrated orange juices collected from
Florida processing plants 1
Water-insoluble Number of samples and season
solids 212 193 197
Reconstituted juice 1956-57 1957-58 1958-59
mg./lOg. % of samples
75- 99 0.0 0.5 1.0
100-124 1.9 9.3 9.6
125-149 10.4 23.3 21.3
150-174 29.7 33.7 39.1
175-199 31.1 20.2 19.3
200-224 21.7 8.8 6.1
225-249 4.2 4.2 3.1
250-274 0.5 0.0 0.0
275-299 0.5 0.0 0.0
300-324 0.0 0.0 0.5
325-349 0.0 0.0 0.0





Table 16. Frequency distribution of flavonoids in samples of
commercial frozen concentrated orange juices collected from Florida
processing plants
Flavonoids as Number of samples and season
hesperidin 212 193 197
Reconstituted juice 1956-57 1957-58 1958-59
me./100ml. % of samples__
20-- 29 0.0 0.0 0.0
30- 39 0.0 0.0 0.0
40- 49 0.0 0.0 0.0
50- 59 0.5 0.0 1.0
60- 69 8.5 8.3 16.8
70- 79 47.2 23.8 41.1
80- 89 29.7 32.1 25.3
90- 99 9.4 19.2 11.2
100-109 4.2 13.0 4.1
110-119 0.5 2.6 0.0
120-129 0.0 0.5 0.5
130-139 0.5 0.0


Samples collected semi-monthly from December
inclusively, during each processing season.
Florida Citrus Experiment Station and Florida Citrus
Lake Alfred, Florida. 927 e 9/16/59 CDA


through June,

Commission,





Table 17. Frequency distribution of pectinesterase activity in samples
of commercial frozen concentrated orange juices collected from Florida
processing plants 1
Pectinesterase activity Number of samples and season
Concentrate 212 193 197
(PE.u.)g. soluble solids2 1956-57 1957-58 1958-59
X 1000 % of samples
0- 4 51.4 91.3 90.4
5- 9 38.2 8.2 8.6
10-14 9.4 0.5 1.0
15-19 1.0 0.0 0.0
20-24 0.0 0.0 0.0
25-29 0.0 0.0 0.0
30-34 0.0 0.0 0.0
35-39 0.0 0.0 0.0
40-44 0.0 0.0 0.0


Table 18. Frequency distribution of water-soluble pectin in samples of
commercial frozen concentrated orange juices collected from Florida
processing plants 1
Number of samples and season
Pectin water soluble 212 193 197
Reconstituted juice 1956-57 1957-58 1958-59
mg./lOOg. % of samples
10-14 0.0 0.0 0.0
15-19 0.0 0.0 0.0
20-24 0.0 0.0 0.0
25-29 0.0 3.1 0.5
30-34 9.4 6.2 5.1
35-39 30.2 32.6 13.2
40-44 26.9 30.6 24.3
45-49 24.1 19.2 30.0
50-54 5.6 5.7 13.7
55-59 2.8 2.6 7.1
60-64 0.5 0.0 5.1
65-69 0.5 0.0 1.0


Samples collected semi-monthly
during each processing season.


from December through June, inclusively,


Soluble solids determined by refractometer at 280C.


Florida Citrus Experiment Station
and Florida Citrus Commission,
Lake Alfred, Florida.
927 f 9/16/59 CDA










Table 19. Frequency distribution for degree of clarification and gelation,after storage of samples at
40oF. or 80F., in commercial frozen concentrated orange juices collected from Florida processing plants 1


Degree of
clarification2


None
Slight
Definite
Extreme


Number of samples and season
221 212 212 212 193 197 221 193 197
1953-54 1954-55 1956-57 1956-57 1957-58 1958-59 1953-54 1957-58 1958-59
After 72 hr. at 400F. After 96 hr. at 400F. After 24 hr. at 800F.
% of samples t i % of samples II % of samples


40.7
16.3
16.3
26.7


43.4
16.5
24.1
16.0


74.5
13.7
9.9
1.9


74.1
5.2
12.7
8.0


96.4
0.0
2.6
1.0


96.0
1.0
1.5
1.5


19.5
7.2
14.5
58.8


90.1
2.1
2.6
5.2


81.2
5.6
4.6
8.6


Degree of
gelation
O-None 49.9 76.8 56.6 53.3 75.7 78.2 57.0 65.8 64.5
1-Very slight 35.7 12.3 24.5 25.0 11.9 20.8 29.0 20.7 26.4
2-Slight 12.2 -9.0 18.9 21.7 11.9 1.0 8.6 13.0 7.6
3-Semi-gel 1.8 1.9 0.0 0.0 0.5 0.0 5.0 0.5 1.5
4-Solid gel 0.4 0.0 0.0 0.0 0.0 0.0 0.4 0.0 0.0
1 Samples collected semi-monthly from December through June, inclusively, during each processing season.
2 Clarification measured by percentage light transmittance of centrifuged reconstituted juice using Lumetron
402-E with 730 filter and 14 ml. cell. None = 0-59%; Slight = 60-69%; Definite = 70-84%; and Extreme = 85-100%.


Florida Citrus Experiment Station
and Florida Citrus Commission,
Lake Alfred, Florida.
927 y 9/16/59 FWW








Table 20. Frequency distribution of diacetyl values for
samples of commercial frozen concentrated orange juices
collected from Florida processing plantsI
Number of samples and season
Diacetyl 212 193 197
value2 1956-57 1957-58 1958-59
p.p.m. % of samples
0.0 5.7 0.0 0.0
0.1 7.1 0.0 0.0
0.2 8.0 1.1 0.5
0.3 13.7 0.5 1.5
0.4 11.8 6.2 10.2
0.5 12.3 5.2 10.7
0.6 11.8 17.1 12.2
0.7 6.6 13.5 10.7
0.8 5.2 9.3 10.2
0.9 2.8 12.4 8.6
1.0 5.2 12.4 9.7
1.1 2.4 4.7 6.6
1.2 0.9 5.7 2.5
1.3 0.45 2.6 3.0
1.4 0.45 4.2 3.0
1.5 1.9 0.0 2.0
1.6 2.8 0.5 0.0
1.7 0.0 0.5 3.6
1.8 0.0 2.1 0.5
1.9 0.0 0.5 1.0
2.0 0.0 0.0 0.5
2.1 0.45 0.5 0.5
2.2 0.45 0.0 0.0
2.3 0.0 0.5 0.0
2.4 0.0 0.0 0.5
2.6 0.0 0.0 0.5
2.7 0.0 0.0 1.0

2.9 0.0 0.5 0.0
3.1 0.0 0.0 0.5

1 Samples collected semi-monthly from December through
June, inclusively, during each processing season.


Diacetyl and
from 300 ml.
diacetyl.


acetyl-methyl-carbinol in 25 ml. of distillate
of 120 Brix reconstituted juice, expressed as


Florida Citrus Experiment Station
and Florida Citrus Commission,
Lake Alfred, Florida.
927 u 9/16/59 ECH







Table 21. Frequency distribution of flavor grades for samples of commercial
frozen concentrated orange juices collected from Florida processing plants1
1956-57 1957-58 1958-59
Flavor Number of % of Number of % of Number of % of
grade2 samples samples samples samples samples samples
Midseason packs 1
Good 39 34 1 1 9 8
Fair 74 65 88 89 102 86
Poor 1 1 10 10 7 6

Totals 114 100 99 100 118 100

Late season paDks 1
Good 60 61 22 23 57 72
Fair 37 38 68 73 22 28
Poor 1 1 4 4 0 0
Totals 98 100 94 100 79 100

Total packs for entire season
Good 99 47 23 12 66 33
Fair 111 52 156 81 124 63
Poor 2 1 14 7 7 4
Totals 212 100 193 100 197 100

1 Samples collected semi-monthly from December through June, inclusively, during
each processing season. Samples of midseason packs collected from December 1
to March 15, inclusively, for the 1956-57 season; from December 1 to February
15, inclusively, for the 1957-58 season; and from December 1 to March 15,
inclusively, for the 1958-59 season.
2 Based on the evaluation of the flavor of 212 samples for the 1956-57 season,
193 samples for the 1957-58 season and 197 samples for the 1958-59 season.
The taste panel followed instructions as given on the following page. Each of
the reconstituted juices from the concentrates was tasted at 3 different times.
The data for the 1956-57 season are based upon 4452 individual flavor grades;
for the 1957-58 season on 3377 grades; and for the 1958-59 season on 3402
grades.





Florida Citrus Experiment Station
and Florida Citrus Commission,
Lake Alfred, Florida.
927 v 9/16/59 FWW











INSTROCTIOk S TO TASTE PANEL


Flavor Evaluation of Frozen Concentrated Orange Juices

Samples: Reconstituted camaercial frozen 420 Brix orange
concentrates.


Directions:


(a) Grade for flavor on the following basis and do
not consider other factors, such as color or separation.


Excellent
Very good
Good
Fair


10
9
8-7
6-5


Poor 4-3
Very Poor 2
Unpalatable 1


Use excellent, good, or fair n6yZ if the juice in. your
opinion is acceptable as frozen orange concentrate, and
therefore, would be repurchased by you.

(b) If you score a sample of Juice 4 or lower, indica-
ting that the product is not acceptable as frozen orange
concentrate, and therefore, would not be repurchased by
you, then indicate all of the flavor defects responsible
for the poor flavor quality.

Indicate flavor defects using 9onl the following descrip-
tive terms. If necessary, other terms will be added to
this list. If you are not sure of the type of flavor
defect in any juice, which you score 4 or lowqr, then
indicate that it is nondescript.


Flavor Defects


Too sour (acid)
Too sweet
Excessive peel oil
Too bitter
Too astringent


Heated
Buttermilk
Cardboard
Castor Oil
Tallowy


Immature fruit
Overmature fruit
Stale fruit
Insipid


Florida Citrus Experiment Station
and Florida Citrus Commission,
Lake Alfred, Florida.
809 9/26/57 FWW








Table 22. Comparison of frequency distribution tables of Brix
values for samples from midseason and late season packs of commercial
frozen concentrated orange juices collected semi-monthly during the
1958-59 citrus season
Brix Midseason Late season Total
value samples = 118 samples = 79 samples = 197
% of samples

40.90-41.40 10.2 6.3 8.6
41.5-41.70 14.4 19.0 16.2
41.80-42.00 42.4 54.4 47.2
42.10-42.30 26.3 19.0 23.4
42.40-42.6 5.9 0.0 3.6
More than 42.60 0.8 1.3 1.0


Table 23. Comparison of frequency distribution tables of total acid
in samples from midseason and late season packs of commercial frozen
concentrated orange juices collected semi-monthly during the 1958-59
citrus season
Acid as Midseason Late season Total
citric % samples = 118 samples = 79 samples = 197
% of samples
Less than 2.50 0.0 1.3 0.5
2.50-2.69 4.2 15.2 8.6
2.70-2.89 9.3 27.8 16.8
2.90-3.09 39.9 36.7 38.6
3.10-3.29 40.7 17.7 31.5
3.30-3.49 5.9 1.3 4.0


Florida Citrus Experiment Station
and Florida Citrus Commission,
Lake Alfred, Florida.
927 m 9/16/59 RLH








Table 24. Comparison of frequency distribution tables of Brix-to-acid
ratios in samples from midseason and late season packs of commercial
frozen concentrated orange juices collected semi-monthly during the
1958-59 citrus season

Brix-to-acid Midseason Late season Total
ratio samples = 118 samples = 79 samples = 197
% of samples
12.0-12.9 16.1 2.5 10.7
13.0-13.9 51.7 29.2 42.6
14.0-14.9 26.3 35.5 29.9
15.0-15.9 4.2 21.5 11.2
16.0-16.9 1.7 10.1 5.1
More than 16.9 0.0 1.2 0.5









Table 25. Comparison of frequency distribution tables of pH in
samples from midseason and late season packs of commercial frozen
concentrated orange juices collected semi-monthly during the 1958-59
citrus season
pH of Midseason Late season Total
concentrate samples = 118 samples = 79 samples = 197
% of samples

3.4 3.4 0.0 2.0
3.5 51.7 13.9 36.5
3.6 43.2 60.8 50.3
3.7 1.7 25.3 11.2


Florida Citrus Experiment Station
and Florida Citrus Commission,
Lake Alfred, Florida.
927 n 9/16/59 RLH









Table 26. Comparison of frequency distribution tables of recoverable oil in
samples from midseason and late season packs of commercial frozen concentrated
orange juices collected semi-monthly during the 1958-59 citrus season
Recoverable oil
Reconstituted
Concentrate juice Midseason Late season Total
ml./100g. % by volume samples = 118 samples = 79 samples = 197
% of samples
0.003-0.018 0.001-0.005 3.4 0.0 2.0
0.019-0.035 0.006-0.010 32.2 30.4 31.5
0.036-0.052 0.011-0.015 55.1 58.2 56.3
0.053-0.068 0.016-0.020 9.3 11.4 10.2


Table 27. Comparison of frequency distribution tables of ascorbic acid in
samples from midseason and late season packs of commercial frozen concentrated
orange juices collected semi-monthly during the 1958-59 citrus season
Ascorbic acid
Reconstituted
Concentrate juice Midseason Late season Total
mg./100g. mg./100 ml. samples = 118 samples = 79 samples = 197
% of samples


120-129
130-139
140-149
150-159
160-169
170-179
180-189
190-199


36-38
39-41
42-44
45-47
48-50
51-53
54-56
57-59


.1


1 These values were


calculated.


Florida Citrus Experiment Station
and Florida Citrus Commission,
Lake Alfred, Florida.
927 o 9/16/59 RLH


13.9
39.2
25.3
20.3
1.3
0.0
0.0
0.0


0.0
0.0
1.7
5.1
11.0
33.9
35.6
12.7


5.6
15.7
11.2
11.2
7.1
20.3
21.3
7.6









Table 28.
season packs


Comparison of frequency distribution tables of apparent viscosities for samples from midseason and late
of commercial frozen concentrated orange juices collected semi-monthly during the 1958-59 citrus season


SEach sample was thawed for 90 minutes in 30C. water
can, using Brookfield LVT viscometer, No. 2 spindle,


bath; viscosity measured at 3000. with concentrate in 6 oz.
12 r.p.m. with reading made after 1 minute.


2 Time for flow of 150 ml. of concentrate from pipette with product at 300C.


Florida Citrus Experiment Station
and Florida Citrus Commission,
Lake Alfred, Florida.
927 r 9/16/59 GHE


Apparent viscosity at 3000C._
Brookfield Midseason Late season Total Pipette Midseason Late season Total
viscometer1 samples = 113 samples = 76 samples = 189 samples = 113 samples = 76 samples = 189
Centipoises Time in
% of samples seconds2 % of samples

0- 249 0.0 2.5 1.1 10-19 17.7 57.9 33.8
250- 499 17.7 62.0 35.5 20-29 39.8 32.9 37.0
500- 749 51.3 30.0 42.3 30-39 21.2 6.6 15.3
750- 999 18.6 5.2 13.7 40-49 9.7 2.6 6.9
1000-1249 6.2 0.0 3.7 50-59 5.3 0.0 3.3
1250-1499 4.4 0.0 2.7 60-69 2.7 0.0 1.6
1500-1749 0.9 0.0 0.5 70-79 1.8 0.0 1.1
1750-1999 0.9 0.0 0.5 80-89 0.9 0.0 0.5
90-99 0.0 0.0 0.0
More than 99 0.9 0.0 0.5
- ,,______________________\________-________________------I--------










Table 29. Comparison of frequency distribution tables of Hunter "Rd* values for samples from midseason and late season
packs of commercial frozen concentrated orange juices collected semi-monthly during the 1958-59 citrus season
Concentrates ________Reconstituted juices
Hunter Color Midseason ILate season Total Hunter Color Midseason Late season Total
Difference Meter samples = 1181 samples = 79 samples = 197 Difference Meter samples = 118 samples = 79 samples = 197
Rd % of samples Rd % of samples
18.0-18.9 0.0 3.8 1.5 19.0-19.9 0.0 3.8 1.5
19.0-19.9 0.0 12.7 5.1 20.0-20.9 0.8 11.4 5.1
20.0-20.9 0.9 17.7 7.6 21.0-21.9 .2.5 21.5 10.2
21.0-21.9 5.9 22.7 12.7 22.0-22.9 10.2 41.7 22.8
22.0-22.9 5.9 15.2 9.7 23.0-23.9 25.5 8.9 18.8
23.0-23.9 10.2 13.9 11.7 24.0-24.9 28.9 11.4 21.8
24.0-24.9 26.2 5.1 17.7 25.0-25.9 20.3 1.3 12.7
25.0-25.9 14.4 8.9 12.2 26.0-26.9 11.0 0.0 6.6
26.0-26.9 17.0 0.0 10.2 27.0-27.9 0.8 0.0 0.5
27.0-27.9 9.3 0.0 5.6
28.0-28.9 4.2 0.0 2.5
29.0-29.9 2.5 0.0 1.5
30.0-30.9 1.7 0.0 1.0
31.0-31.9 0.9 0.0 0.5
32.0-32.9 0.9 0.0 0.5


Florida Citrus Experiment Station
and Florida Citrus Commission,
Lake Alfred, Florida.
927 s 9/16/59 MEW







Table 30. Comparison of frequency distribution tables of Hunter "a" values for samples from midseason and late season
packs of commercial frozen concentrated orange juices collected semi-monthly during the 1958-59 citrus season
Concentrates Reconstituted juices
Hunter Color Vidseason Late season Total Hunter Color Midseason Late season Total
Difference Meter samples = 118 samples = 79 samples = 197 Difference Meter samples Meter samples = 79 samples = 197
a % of samples a ___ % of samples___
10.1-11.0 0.0 1.3 0.5 0.0 to -0.9 0.0 6.3 2.5
9.1-10.0 0.0 10.1 4.1 -1.0 to -1.9 0.0 22.8 9.1
8.1- 9.0 0.9 29.1 12.2 -2.0 to -2.9 0.8 38.0 15.7
7.1- 8.0 0.9 36.7 15.2 -3.0 to -3.9 1.7 21.5 9.6
6.1- 7.0 1.7 19.0 8.6 -4.0 to -4.9 10.2 10.1 10.2
5.1- 6.0 5.1 3.8 4.6 -5.0 to -5.9 48.3 1.3 29.5
4.1- 5.0 18.7 0.0 11.2 -6.0 to -6.9 37.3 0.0 22.4
3.1- 4.0 38.0 0.0 22.8 Less than -6.9 1.7 0.0 1.0
2.1- 3.0 32.2 0.0 19.3
1.1- 2.0 2.5 0.0 1.5



Table 31. Comparison of frequency distribution tables of Hunter "b" values for samples from midseason and late season
packs of commercial frozen concentrated orange juices collected semi-monthly during the 1958-59 citrus season
Concentrates Reconstituted juices
Hunter Color Midseason Late season Total Hunter Color Midseason Late season Total
Difference Meter samples = 118 = 79 s = 79 samples = 197 Difference Meter samples = 118 samples = 79 samples = 197
b % of samples b % of samples
More than 34.9 3.4 1.3 2.5 32.0-32.9 0.0 1.3 0.5
34.0-34.9 14.4 12.7 13.7 31.0-31.9 0.0 20.3 8.1
33.0-33.9 27.1 22.8 25.4 30.0-30.9 5.9 46.8 22.3
32.0-32.9 39.0 37.9 38.6 29.0-29.9 29.7 25.3 28.0
31.0-31.9 12.7 25.3 17.8 28.0-28.9 49.1 6.3 32.0
30.0-30.9 3.4 0.0 2.0 27.0-27.9 13.6 0.0 8.1
26.0-26.9 1.7 0.0 1.0


Florida Citrus Experiment Station and Florida
Lake Alfred, Florida. 927 t 9/16/59 MDM


Citrus Commission,






Table 32. Comparison of frequency distribution tables of pulp in
samples from midseason and late season packs of commercial frozen
concentrated orange juices collected semi-monthly during the 1958-59
citrus season

PulpI Midseason Late season Total
% by volume samples = 118 samples = 79 samples = 197
_% of samples
7.0 0.0 1.3 0.5
7.5 1.7 1.3 1.5
8.0 2.6 7.6 4.6
8.5 2.6 8.8 5.1
9.0 7.6 12.7 9.7
9.5 2.6 15.2 7.6
10.0 16.9 24.0 19.8
10.5 14.4 10.1 12.7
11.0 14.4 8.8 12.2
11.5 5.1 5.1 5.1
12.0 14.4 3.8 10.1
12.5 3.4 1.3 2.5
13.0 7.6 0.0 4.6
13.5 0.8 0.0 0.5
14.0 1.7 0.0 1.0
14.5 0.0 0.0 0.0
15.0 1.7 0.0 1.0
15.5 1.7 0.0 1.0
16.0 0.8 0.0 0.5
1 Determined by centrifugal method; does not include floating pulp.



Table 33. Comparison of frequency distribution tables of water-
insoluble solids in samples from midseason and late season packs of
commercial frozen concentrated orange juices collected semi-monthly
during the 1958-59 citrus season
Water-insoluble
solids
Reconstituted juice Midseason Late season Total
mg./lOO1g. samples = 118 samples = 79 samples = 197
% of samples
75- 99 1.7 0.0 1.0
100-124 11.0 7.6 9.6
125-149 21.2 21.5 21.3
150-174 39.0 39.2 39.1
175-199 16.9 22.8 19.3
200-224 7.6 3.8 6.1
225-249 2.6 3.8 3.1
250-274 0.0 0.0 0.0
275-299 0.0 0.0 0.0
300-324 0.0 1.3 0.5
Florida Citrus Experiment Station
and Florida Citrus Commission,
Lake Alfred, Florida. 927 p 9/16/59 -CDA





Table 34. Comparison of frequency distribution tables of flavonoids in
samples from midseason and late season packs of commercial frozen concentrated
orange juices collected semi-monthly during the 1958-59 citrus season


Flavonoids as
hesperidin
Reconstituted juice
mg./loO ml.


Midseason


Late season
samples = 79
% of samples


50- 59 0.8 1.3 1.0
60- 69 8.5 29.1 16.8
70- 79 36.4 48.1 41.1
80- 89 33.1 13.9 25.3
90- 99 13.6 7.6 11.2
100-109 6.8 0.0 4.1
110-119 0.0 0.0 0.0
120-129 0.8 0.0 0.5


Table 35. Comparison of frequency distribution tables of pectinesterase
activity in samples from midseason and late season packs of commercial frozen
concentrated orange juices collected semi-monthly during the 1958-59 citrus
season
Pectinesterase activity
Concentrate Midseason Late season Total
(PE.u.)g. soluble solids1 samples = 118 samples = 79 samples = 197
X 1000 % of samples
0- 4 92.4 87.3 90.4
5- 9 5.9 12.7 8.6
10-14 1.7 0.0 1.0
1 Soluble solids determined by refractometer at 28C.


Table 36. Comparison of frequency distribution tables of water-soluble
pectin in samples from midseason and late season packs of commercial frozen
concentrated orange juices collected semi-monthly during the 1958-59 citrus
season
Pectin water soluble Midseason Late season Total
Reconstituted juice samples = 118 samples = 79 samples = 197
mg./100 g. % of samples
25-29 0.0 1.3 0.5
30-34 5.9 3.8 5.1
35-39 6.8 22.8 13.2
40-44 18.7 32.9 24.3
45-49 30.5 29.1 30.0
50-54 18.6 6.3 13.7
55-59 9.3 3.8 7.1
60-64 8.5 0.0 5.1
65-69 1.7 0.0 1.0


Florida Citrus Experiment Station
and Florida Citrus Commission,
Lake Alfred, Florida. 927 q 9/16/59


- CDA








Table 37.
of samples at
orange juices


Comparison of frequency distribution tables for degree of clarification and gelation, after storage
40oF. and 800F., in samples from midseason and late season packs of commercial frozen concentrated
collected semi-monthly during the 1958-59 citrus season


After 96 hr. at 400F. After 24 hr. at 800F.
Degree of Midseason Late season Total Midseason Late season Total
clarificationI samples = 118 samples = 79 samples = 197 samples = 118 samples = 79 samples = 197
.________. % of samples __________ % of samples
None 94.1 98.7 96.0 74.6 91.2 81.2
Sliglt 1.7 0.0 1.0 7.6 2.5 5.6
Definite 1.7 1.3 1.5 5.9 2.5 4.6
Extreme 2.5 0.0 1.5 11.9 3.8 8.6


Degree of
gelation
0-None 80.5 74.7 78.2 61.9 68.3 64.5
1-Very slight 17.8 25.3 20.8 28.0 24.1 26.4
2-Slight 1.7 0.0 1.0 7.6 7.6 7.6
3-Semi-gel 0.0 0.0 0.0 2.5 0.0 1.5
4-Solid gel 0.0 0.0 0.0 0.0 0.0 0.0

I Clarification measured by percentage light transmittance of centrifuged reconstituted juice using Lumetron
402-E with 730 filter and 14 ml. cell. None = 0-59%; Slight = 60-69 ; Definite = 70-840a; and Extreme = 85-100%.





Florida Citrus Experiment Station
and Florida Citrus Commission,
Lake Alfred, Florida.
927 w 9/16/59 FWW









Table 38. Comparison of frequency distribution tables of
diacetyl values for samples from midseason and late season packs
of commercially frozen concentrated orange juices collected
semi-monthly during the 1958-59 citrus season
Diacet 1 Midseason Late season Total
value" samples = 118 samples = 79 samples = 197
p.p.m. % of samples

0.2 0.85 0.0 0.5
0.3 2.5 0.0 1.5
0.4 17.0 0.0 10.2
0.5 15.3 4.0 10.7
0.6 11.9 12.6 12.2
0.7 11.0 10.1 10.7
0.8 11.0 8.8 10.2
0.9 5.9 12.6 8.6

1.0 7.6 12.6 9.7
1.1 2.5 12.6 6.6
1.2 0.85 5.1 2.5
1.3 3.4 2.5 3.0
1.4 3.4 2.5 3.0
1.5 1.7 2.5 2.0
1.6 0.0 0.0 0.0
1.7 0.85 7.6 3.6
1.8 0.0 1.3 0.5
1.9 1.7 0.0 1.0

2.0 0.0 1.3 0.5
2.1 0.85 0.0 0.5
2.4 0.85 0.0 0.5
2.6 0.0 1.3 0.5
2.7 0.85 1.3 1.0
3.1 0.0 1.3 0.5


Diacetyl and
from 300 ml.
diacetyl.


acetyl-methyl-carbinol in 25 ml. of distillate
of 120 Brix reconstituted juice, expressed as


Florida Citrus Experiment Station
and Florida Citrus Commission,
Lake Alfred, Florida.
927 x 9/16/59 ECH