Determination of Chromium,Arsenic,Cadmium and Lead in Four Kinds of Root and Tuber Vegetables by Microwave Digestion Combined with Inductively Coupled Plasma Mass Spectrometry
Objective:This study establishes a method for detecting heavy metals that combines microwave digestion with inductively coupled plasma mass spectrometry(ICP-MS).It explores the impact of different sampling methods(root tissue,whole sample,and peel)on the contents of chromium,arsenic,cadmium,and lead in white radishes,carrots,potatoes,and ginger.Method:The applicability of the detection method was validated through linear correlation,detection limits,quantification limits,recovery rates of spiked samples,and repeatability.The effects of different sampling methods on heavy metal content in the four root vegetables were also determined.Result:In the range of 0.5～20.0 μg·L-1,the method had a good linear relationship with low limits of detection and quantitation.The recoveries were 90.1%to 108.0%and the relative standard deviations were 0.6%to 3.5%.The highest heavy metal content was detected in the skin treatment group,and the chromium content in white radish,potato and ginger,the arsenic content in white radish and potato,and the lead content in white radish and ginger were significantly affected(P＜0.05).Conclusion:This method is suitable for the determination of chromium,arsenic,cadmium and lead in white radish,carrot,potato and ginger.Heavy metals are mainly concentrated in the epidermal tissue,and peeling treatment may significantly affect the detection results.
microwave digestioninductively coupled plasma mass spectrometrysampling methodsroot vegetablesheavy metals
万方数据
维普
