Friedrich Christian Accum (1769–1838)

Interesting if you want to know the dangers of the past.

Also mentions how to do tests to see if water and food are contaminated with things like lead and copper using chemistry.

I would recommend reading up on the chemicals he says to use before using them. It's better to err on the side of caution.

Volume II. Exhibiting the fraudulent sophistications of bread, beer, wine, spiritous liquors, tea, coffee, cream, confectionery, vinegar, mustard, pepper, cheese, olive oil, pickles, and other articles employed in domestic economy. And methods of detecting them. Philadelphia, 1820.