Heavy Metals

Heavy metals have a relatively high density and are toxic or poisonous at high concentrations. We analysed milk for lead, copper, arsenic, tin, zinc and cadmium content. As per the requirement laid down by FSS Rules, lead should not be more than 2 ppm, copper not more than 30 ppm, arsenic not more than 0.1 ppm, tin not more than 250 ppm, zinc not more than 50 ppm, and cadmium not more than 1.5 ppm. Lead, arsenic, tin and cadmium were not detected in any of the brands. Zinc and copper were found in some brands but were well below the maximum specified limit. Overall, all brands passed the tests for heavy metals.