碰撞反应池-电感耦合等离子体质谱法同时测定甘蔗中的9种重金属元素

Simultaneous Determination of 9 Heavy Metal Elements in Sugarcane by ICP-MS Coupled with Collision Cell Technology

采用微波消解技术对样品进行前处理,以^74 Ge、^115In、^209Bi、^45Sc为内标元素消除非质谱干扰,以氦气为碰撞反应气消除质谱干扰,建立了电感耦合等离子体质谱法同时测定甘蔗中重金属元素铅、镉、砷、铊、钒、铬、锡、钴和镍的方法。在优化的试验条件下,方法的线性范围为0.04~50μg·L^-1,相关系数均大于0.999,铅、镉、砷、铊、钒、铬、锡、钴和镍的检出限（3s）分别为5.7,0.11,0.67,0.067,2.8,1.1,3.1,6.2,4.3ng·L^-1。方法用于分析标准物质,测定结果与认定值相符。

A novel method was established to measure of heavy metals such as Pb,Cd,As,Tl,V,Cr,Sn,Co and Ni in sugarcane by ICP-MS with microwave digestion for sample preparation.^72 Ge,^115 In,^209Bi and ^45 Sc were used as the internal standard elements to eliminate non-spectroscopic interference and helium was used as collision gas to eliminate mass spectroscopic interference.Under optimized conditions,the linear range of this method was 0.04-50μg·L^-1 with correlation coefficients over 0.999.The detection limits for Pb,Cd,As,Tl,V,Cr,Sn,Co and Ni were 5.7,0.11,0.67,0.067,2.8,1.1,3.1,6.2,4.3ng·L^-1,respectively.The method was used to analyze standard substances,giving results consistent with the certified values.