Learn how to test pH of food for canning in a water bath to ensure that you are meeting the requirements for high-acid foods. This is an educational tool and not a license to change lab-tested recipes ...

Dr Yingfu Li, professor at McMaster University, and his team created a test for E. coli based on the Litmus test for pH. The test is a colorimetric sensor where existing Litmus dyes and pH papers ...

Litmus paper, long known as a low-tech method of testing substances for acidity, might have a new use as a cheap, quick way to test for E. coli, according to researchers at McMaster University in ...