Determination of 15 elements in shellfish by microwave digestion with ICP-MS

A method involving microwave digestion and inductively coupled plasma-mass spectrometry(ICP-MS) analysis were established for the determination of fifteen elements(V,Cr,Mn,Fe,Co, Ni,Cu, Zn,As,Se,Cd,Sn,Hg,Tl,Pb) in shellfish.Rhenium was used as an internal standard element to calibrate the results of determination of these fifteen elements.Good linearity of the calibration curves was obtained for all target elements(r=0.9991～1.0000).Detection limits for these fifteen elements were in the range of 0.98 μg/L to 1105 μg/L.The DORM-2 and TORT-2 standard reference materials were analyzed with above method, and the results of fifteen elements were in good agreement with the reference value.The oyster sample was measured parallel five times and the RSD was lower than 5.0%, which showed that the method was very precise.The technique was applied for the quality control and safety evaluation of shellfish.