A REPORT ON EFFECTS OF DIFFERENT TYPES OF CONTAINERS ON THE KEEPING QUALITY OF MILK WITH OR WITHOUT BORAX

Abstract

The keeping quality of raw cow milk at room temperature was evaluated in different containers with or without borax. Milk samples stored in containers of glass, plastic, aluminium, and earthen at 25 to 28◦C in November, 2013 were analyzed every 2 hours for acidity and clot-on-boiling (COB) tests. Milk from the organised dairy farm kept well in aluminium containers up to 10 hours, but milk from vendor’s deteriorated after 6 hours. The keeping qualities of milk were poorer in other containers, and worst in earthen container. In COB test, milk from dairy farm showed no changes for 8 hours in all containers. Milk in aluminium container kept 14 hours, but only 8 hours in earthen pot. Milk collected from villages kept for 10 hours in aluminium container and 6 hours in earthen container. After mixing borax 0.05 and 0.1%, milk kept well up to 16 hours and up to 20 hours with 0.15% based on acidity test. Addition of borax improved the keeping quality till 24 hours of storage at 25 – 28◦C in aluminium container