RINGER SALT SOLUTION POWDER

Ringer Salt Solution Powder is recommended as an isotonic diluent for microbiological examination of foods. Any diluent used in microbiological examination should be isotonic with the cells to be suspended. It should also preferably contain a buffer and certain ions necessary for the optimal maintenance of cells.
Ringer Salt Solution is isotonic with bacteria and thus prevents them from being subjected to osmotic stress when they are removed from their customary environment. It is physiologically superior to physiological saline for sensitive organisms.

an isotonic diluent for food, milk and dairy products during microbiological testing