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ORS-ICP-MS测定工业污泥中的重金属元素

Keywords: 电感耦合等离子体质谱,八极杆碰撞/反应池,工业污泥,重金属元素

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Abstract:

建立了八极杆碰撞/反应池电感耦合等离子体质谱(ORS-ICP-MS)法测定工业污泥中Cr、Ni、As、Cd、Sb、Sn、Hg和Pb等8种重金属元素的分析方法。应用ORS技术消除了多原子离子对待测元素产生的质谱干扰,通过研究He碰撞气流速的变化对Cr、Ni、As和Sb预估检测限(EDL)的影响情况确定了最佳碰撞气流速,采用Rh为内标元素校正了质谱分析中基体效应并补偿了信号漂移。方法对工业污泥样品的检出限为13.5~34.3ng/L,加标回收率在93.0%~107.6%之间,相对标准偏差(RSD)为1.5%~2.8%。

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