本研究采用微波消解样品，电感耦合等离子体发射光谱法测定了芥菜样品中多种微量元素（铝Al，砷As，镉Cd，钴Co，铬Cr，铜Cu，锰Mn，镍Ni，铅Pb）的含量。在选定的最优条件下，本方法各元素的回收率在92.8~108.3%之间。仪器检出限为铝：0.15 mg/L、砷：0.01 mg/L、镉：0.005 mg/L、钴：0.01 mg/L、铬：0.01 mg/L、铜：0.03 mg/L、锰：0.01 mg/L、镍：0.01 mg/L、铅：0.01 mg/L且各元素的相关系数均在0.999以上。研究结果表明，芥菜样品中砷As、镉Cd、铬Cr、铅Pb等重金属均符合国家标准食品中污染物的限量。此测定结果可为检测芥菜中所含金属元素含量的多少，提供科学的数据。

The contents of multiple elements（Al, As, Cd, Co, Cr, Cu, Mn, Ni and Pb）in six samples of leaf mustard tested by ICP-AES with microwave digestion. Under the optimal conditions, the recoveries of nine elements were in the range of 92.82~108.26%. The detection limit of ICP-AES was Al 0.15 mg/L, As 0.01 mg/L, Cd 0.005 mg/L, Co 0.01 mg/L, Cr 0.01 mg/L, Cu 0.03 mg/L, Mn 0.01 mg/L, Ni 0.01 mg/L, Pb 0.01 mg/L and the correlation coefficient was better than 0.999. It was concluded that elements（As, Cd, Cr and Pb）match the National Standard of Maximum levels of contaminants in food of China. The data can be applied to the quality control of trace elements in leaf mustard.

国家自然科学基金资助项目（51072236）