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View free testsProcessing & Preservation
Preserving food by placing it in a highly acidic or salty liquid, such as vinegar, salt brine, or oil, where most spoilage microbes cannot survive.
Mango and lime achar made at home each summer is a classic Indian example of pickling using salt, oil, and spices together.
A substance that tastes sour and has a pH below 7. In food, acids come from fruits, curd, or are added on purpose.
The natural movement of water from a less concentrated solution to a more concentrated one, through a membrane, without needing outside energy.
A number from 0 to 14 that tells us how acidic or basic (alkaline) something is. 7 is neutral, below 7 is acidic, above 7 is basic.
