364 



CHEMICAL TESTS AND ANALYSES 



pipette may be used. After emptying the pipette into the bottle it 

 should be rinsed twice and the rinsings discharged into the test 

 bottle. 



For making numerous tests 

 from the same sample it is advis- 

 able to dilute the evaporated milk 

 with equal parts of water, by 

 weight; then weigh nine grams of 

 this dilution into the test bottle and 

 add one-half pipetteful of water. 



S = 



2 =: 



--B 



Read from A to D 



Pig-. Ill 

 Beading* the Babcock test 



The Roese-Gottlieb Method. 



Proceed as directed under 

 "Sweetened Condensed Milk." 



MILK POWDER. 



Total Solids. 



Weigh 5 grams of the milk 

 powder in a drying bottle or evap- 

 orating dish and place in drying 

 oven at 100 to 105 degrees C. until 

 constant weight is secured. 



Ash. 



Weigh two grams of the milk powder in a weighed platinum 

 dish and proceed as directed under "Milk." 



Proteids. 



Use five grams of the milk powder and proceed as directed 

 under "Milk." 



Milk Sugar (Lactose). 



Dissolve ten grams of milk powder in 90 c.c. of water. Warm 

 and stir until a satisfactory solution is effected and proceed as di- 

 rected under "Milk," and multiply result by 10. 



Sucrose. 



For the determination of sucrose proceed as directed under 

 "Sweetened Condensed Milk." 



