For testing the freshness of milk, the scientists of an Indian Institute of Technology, Guwahati have developed a simple paper kit. It also tells about the pasteurisation that whether it is done well or not.
Important points about Paper Sensor
- Aided with a smartphone app, the kit will ensure that milk is consumed before it turns too sour.
- An indicator of milk quality is a milk enzyme namely Alkaline Phosphate or ALP, its presence even after pasteurisation indicates the presence of microbes that may not have been rendered inactive with pasteurisation.
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