DETERMINATION OF Cd, Cu, Pb AND Zn IN MILK BY ISOTOPE DILUTION METHOD (ID - ICP - MS)

Abstract

      Metals Cd, Cu ,Pb and Zn in milk has been analyzed by isotope dilution ICP-MS. Isotopes 110Cd, 65Cu, Pb207 and 68Zn were used in diluted isotopes. Found a mixture of digestates and suitable temperature to digest 0.2 g of milk . LODs and LOQs respectively from 2.0 to 16 μg.kg-1 and 6.0 to 48 μg.kg-1. Recoveries in the range 88 to 104 % . The relative standard deviation is less than 2 %.

Từ khóa: 110Cd, 65Cu, Pb207 và 68Zn, ICP-MS, phương pháp pha loãng đồng vị, sữa.