微波消解-电感耦合等离子体质谱法测定水生蔬菜中八种重金属元素

Application of microwave digestion-inductively coupled plasma mass spectrometry for simultaneous determination of eight heavy metals in aquatic vegetable

采用微波消解-电感耦合等离子体质谱法测定水生蔬菜中8种重金属元素,对该方法的线性范围、检出限、精密度和回收率进行了研究。结果表明,铅、砷、汞、镉、铬、铜、锌、镍8种重金属在线性浓度范围内线性关系良好,检出限在0.000 3~0.002 0 mg/kg,回收率在92.0%~108.0%,RSD均小于10%。该方法具有操作简单、灵敏度高、精密度好、准确率高等优点,适合用于水生蔬菜中铅、砷、汞、镉、铬、铜、锌、镍的同时测定。

A microwave digestion-inductively coupled plasma mass spectrometry for simultaneous determination of eight heavy metal elements in aquatic vegetable was established. The linear range, limit of detection, precision and recovery of the method were investigated. These eight heavy metal elements showed a linear relationship of concentration range. The detection limit was between 0.000 3~0.002 0 mg/kg and the recovery rate ranged between 92.0%~108.0%. The relative standard relative deviation was less than 10%. The advantages of the method established in this study were simple, high sensitivity and precision, less detection limit and good accuracy. The method has great application prospects in the simultaneous determination of eight heavy metal elements in aquatic vegetable.