370 THE MOJONNIER TEST 



(2) Make extractions exactly as in test for butter fat in 

 condensed milk, excepting that in second extraction only 15 c.c. 

 of each ether need be used. 



(3) Percentage butter fat is obtained by multipling the 

 weight of the extracted butter fat by 10. 



(4) If any of these products have soured badly, double the 

 quantity of ammonia in the regular extraction and shake until 

 all particles are dissolved. 



Total Solids Determination. 



(1) Determine total solids as in evaporated milk, excepting 

 that a two-gram sample is weighed out, *and no water need be 

 added to spread the milk over the bottom of the dish. 



SWEETENED CONDENSED MILK, EVAPORATED MILK 

 AND CONDENSED BULK MILK. 



Butter Fat Determination. 



(1) Remove flask from holder and run 4 c.c. water (one 

 charge on water burette) into each flask. Be careful not to add 

 more. Shake well until all of sample is mixed with water. This 

 can be done without inserting cork. 



For Sweetened Condensed Milk, if not diluted with water, 

 add 6 c.c. of hot water with a pipette. To get hot water place fat 

 dish filled with distilled water upon solids plate. If sweetened 

 milk has been previously diluted with water and a ten-gram 

 sample has been used, it is not necessary to add water. 



It is very necessary to shake the flasks containing the sweet- 

 ened condensed milk very thoroughly after the addition of each 

 reagent. Sweetened condensed milk requires more shaking 

 than any other liquid milk product. 



(2) Before replacing flask into holder, add \ l / 2 c.c. c.p. am- 

 monia. Shake well so that all of sample is well mixed with 

 ammonia. This can be done without inserting cork. 



(3) Add 95 per cent alcohol up to base of top bulb of ex- 

 traction flask. Insert cork, using best quality corks only. Re- 

 place flask into flask holder. Shake thoroughly and see that no 

 milk adheres to any part of flask undissolved. In case particles 

 of milk stick to side of flask, shake thoroughly until these are 



