Objective:Determination of harmful elements such as mercury,arsenic,cadmium,lead,and copper in yam by inductively coupled plasma mass spectrometry(ICP-MS).Method:Microwave digestion was used to treat samples,with 209Bi,72Ge,115In as internal standards.The content of five harmful elements was determined by ICP-MS.Result:The linear relationship was good within the concentration range of 0～10.0 μg·L-1 for mercury,0～50 μg·L-1 for arsenic,0～20 μg·L-1 for cadmium,0～50 μg·L-1 for lead,and 0～500 μg·L-1 for copper.Precision test showed that the relative standard deviation of five harmful elements was less than 2.2%;the recoveries of mercury,arsenic,cadmium,lead and copper were 84.7%,87.8%,84.7%,81.9%and 87.2%,and the relative standard deviation was less than 2.9%.Conclusion:This method is simple,fast,and highly accurate,can be used to simultaneously determine the content of five harmful elements in yam.
yaminductively coupled plasma mass spectrometryharmful elementsrisk assessment
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