DAIRY HUSBANDRY 
63 
EXERCISE NO. 47 
Object: To become acquainted with the Acetic and Sulfuric acid test for ice 
cream by using Babcock equipment. 
Procedure: For ice cream that contains chocolate and has been homo¬ 
genized at a high pressure, it is very difficult to obtain a repre¬ 
sentative result with any of the methods described in this 
manual. 
A. Weigh out a 9 gram sample of thoroughly mixed ice cream into 
a 30% cream test bottle. Add 9 cc. of water to dilute the 
sample. Add 5 cc. of acetic acid and then add carefully 6-8 cc. 
of sulfuric acid (sp. gr. 1.82-1.83). Centrifuge and read as 
for cream. Multiply the reading by 2 if an 18 gram test 
bottle is used. 
Observations: 
Sample 
cc. sample 
cc. acetic 
acid 
cC. sulfuric 
acid 
% fat 
Condition 
1 
2 
Conclusions: 
Questions: (1) About how many pounds of milk are required to make 
one gallon of ice cream? 
(2) What is the average composition of ice cream? 
(3) If a 7 gram sample of ice cream gave a reading of 4.9 in an 18 
gram bottle, what % fat did the ice cream contain? 
(4) If a 12 gram sample of ice cream gave a reading of 15 in a 9 
gram bottle, what % fat did the ice cream contain? 
References: F. & W. 108; Van S. pp 95-100; Jud. pp 87-88. 
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