Analytical Method Based on Inductively Coupled Plasma Mass Spectrometry and Health Risk of Heavy Metal Elements in Prawns

A analytical method based on microwave assisted digestion and inductively coupled plasma mass spectrometry for analyzing the concentrations of heavy metal elements in prawns of Haikou city,which were used to assess the health risk for consumers. The results suggested that at the spiked levels of 0.4,1.0 and 2.0 μg/g,the recovery rates of nine metal elements at acceptable levels,indicating a good perform of this method. In addition,the concentrations of 9 heavy metal elements(Cr,Mn,Co,Ni,Cu,Zn,As,Cd and Pb)in GBW10050(GSB-28)prawns were analyzed based on this method,and the relative standard deviations between measured values and true values below 10%. The 9 heavy metal elements were detectable in prawns of Haikou city. The concentrations and detection rates of Zn,Cu and Mn(100%)were the greatest among 9 elements. These for another 6 kind of elements ranged from 32.2% to 96.4%. The 5%,media,mean and 95% cancer risk of Cr and As in prawns for consumers were 4.16×10^-6,1.06×10^-5,9.05×10^-6 and 2.14×10^-5,respectively,indicating a potential risk but not serious. The non-cancer risk values of 9 elements were lower than 1,which indicated that no obvious non-carcinogenic effects occurred. In general,the analytical method could effectively analyze heavy metal elements in prawns and the pollution of heavy metal elements in prawns of Haikou city was not serious.