电感耦合等离子体质谱法测定芦荟、人参、五味子、龙胆草中5种重金属含量

Determination of 5 heavy metals in aloe, ginseng, Schisandra chinensis and gentian by inductively coupled plasma mass spectrometry

中文关键词:  芦荟  人参  五味子  龙胆草  微波消解  电感耦合等离子体质谱法  重金属

英文关键词:aloe  ginseng  Schisandra chinensis  gentian  microwave digestion  inductively coupled plasma mass spectrometry  heavy metals

中文摘要:

      目的 建立电感耦合等离子体质谱法测定辽宁地区芦荟、人参、五味子、龙胆草中5种重金属含量的方法。方法 微波消解法处理样品, 采用电感耦合等离子体质谱法测定, 射频功率1500 W, 采用碰撞模式, 碰撞气为氦气, 载气为氩气, 载气流速0.7 L/min, 等离子体气体流速15.0 L/min, 泵速0.3 r/s。结果 5种重金属线性关系良好(r>0.9990); 加样回收率为89.8%~98.6%(n=6); 检出限为0.001~0.05 mg/kg。200个样本中重金属的不合格情况: 人参中汞不合格率为14%, 五味子中镉不合格率为12%, 龙胆草中镉不合格率为28%, 其他均符合标准要求。结论 本方法准确可靠、灵敏简便, 可用于芦荟、人参、五味子、龙胆草中多种重金属的的质量研究同时为测定。

英文摘要:

      Objective To establish method for the determination of 5 heavy metals in aloe, ginseng, Schisandra chinensis and gentian in Liaoning area by inductively coupled plasma mass spectrometry. Methods The samples were processed by microwave digestion and determined by inductively coupled plasma mass spectrometry. The RF power was 1500 W, the collision mode was adopted, the collision gas was helium, the carrier gas was argon, the carrier gas flow rate was 0.7 L/min, the plasma gas flow rate was 15.0 L/min, and the pump speed was 0.3 r/s. Results The linear relationship of the 5 heavy metals was good (r>0.9990), the recovery rate was 89.8%~96.9% (n=6), the detection limit was 0.001–0.05 mg/kg. The unqualified conditions of heavy metals in 200 samples: the unqualified rate of mercury in ginseng was 14%, cadmium in schisandrae was 12%, cadmium unqualified rate of gentian was 28%, and other all met the standard requirements. Conclusion This method is accurate, reliable, sensitive and simple. It can be used to determine the various heavy metals in aloe, ginseng, Schisandra chinensis and gentian.