EFFECT OF CERTAIN CHEMICAL PRESERVATIVES ON THE PHYSICO- CHEMICAL PROPERTIES OF COW AND BUFFALO MILK.

The efficiency of milk sample preservatives such as Formalin-0.4%, Potassium dichromate-0.4% and Bronopol (2-Bromo-2Nitro-l, 3 Propanediol)- 0.1% was compared. Cow and buffalo milk samples could be preserved up to 90, 30 days with the addition of formalin and potassium dichromate respectively. Bronopol treated cow and buffalo milk samples could be preserved for 24, 16 days respectively. Significant difference was noticed in titratable acidity and pH of the preserved samples when compared to control (P<0.05). None of the three preservatives had significant effect on fat, solids-not fat and total solids contents by standard methods. However, samples preserved with potassium dichromate showed significant decline in fat percentage by electronic Milko-tester. [ABSTRACT FROM AUTHOR]