Why should curd and sour substances not be kept in brass and copper vessels?
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Why should curd and sour substances not be kept in brass and copper vessels?
Curd and sour substances should not be kept in brass and copper vessels because the acid in the curd and sour substances reacts with the metal in the vessel. This reaction can cause the metal to corrode and dissolve, releasing metal ions into the food. Additionally, the acid in the curd and sour substances can cause a chemical reaction with the metal, which can change the taste and quality of the food. To test for the presence of metal ions, one could use a pH test strip or a metal testing kit, which will change color in the presence of metal ions.