Changes of heavy metal contents in pickle cooked in ceramic pot

Objective To explore the changes of heavy metal contents sucha sAs,Hg,Pb,Cd,Cr,Ni,Cu in the pickle cooked in ceramicpot.Methods Atomic fluore scence spectrum(AFS)and inductively coupled plasma mass spectrum(ICPMS)were used to determine the concentrations of the heavy metal ions in pickle samples and in the soups after digestion with microwave digestion system.Results Compared to the concen trations of heavy metal ions in the un cooked pickle and its so up,the concentrations of Hg,Pb,Cd,Cr,and Cu in the so up increa sed from 1.71,22.10,6.10,40.05,and 128.00 g/L to 3.76,26.75,8.20,53.50,and 183.75 g/L,with the increase rates of 220%,21%,13%,34%,and 44%,respectively,and the concentrations of the elements in the pickle increased from 35.34,397.96,20.35,213.12,and 1.07×10³μg/kg to 78.75,460.39,23.02,387.31,and 2.10×10³μg/kg,w ith the increase rates of 222%,17%,34%,81%,and 96%,respectively.Conclusion Much more Hg,Cr,and Cu and a little Pb and Cd and rare As and Ni were disso lved from the body of the pot when ceramic vessel was used for cooking pickle.