I recall we did simple tests like this in school - we had to bring in samples of foodstuffs from home to do the tests, and the school would provide a positive c

I recall we did simple tests like this in school - we had to bring in samples of foodstuffs from home to do the tests, and the school would provide a positive control. This must have been the seventh grade or so? https://www.vasantmasala.com/blog/how-to-check-adulteration-in-turmeric-powder-at-home/ https://www.vasantmasala.com/blog/how-to-check-adulteration-...