电感耦合等离子体质谱法测定高岭土中的15种稀土元素

发布时间：2018-07-10 10:25

本文选题：电感耦合等离子体质谱法 + 稀土元素　；参考：《理化检验(化学分册)》2017年06期

【摘要】：样品经硝酸-氢氟酸-硫酸三酸消解后,以103 Rh为内标,采用电感耦合等离子体质谱法测定高岭土中的15种稀土元素。采用标准物质制备工作溶液绘制校正工作曲线消除质谱干扰,通过控制样品的稀释因子消除非质谱干扰。各元素的线性范围为0.20~200mg·kg~(-1),检出限在0.03~0.09 mg·kg~(-1)之间。方法用于分析岩石标准物质,测定值与认定值的相对误差在-6.7%~8.3%之间,相对标准偏差(n=5)在0.70%~5.9%之间。实际样品中15种稀土元素的测定值的相对标准偏差在3.8%~12%之间。
[Abstract]:15 rare earth elements in kaolin were determined by inductively coupled plasma mass spectrometry (ICP-MS) with 103 Rh as internal standard after digestion by nitric acid hydrofluoric acid-sulphuric acid. The calibration curve of standard material preparation solution was used to eliminate the mass interference, and the non-mass spectrum interference was eliminated by controlling the dilution factor of the sample. The linear range of each element is 0.20~200mg kg ~ (-1), the detection limit is 0.03 ~ 0. 09 mg kg ~ (-1). The method has been applied to the analysis of rock reference materials. The relative error between the measured value and the determined value is between -6.7% and 8.3%, and the relative standard deviation (nb5) is between 0.70% and 5.9%. The relative standard deviation for the determination of 15 rare earth elements in actual samples is between 3.8% and 12%.
【作者单位】：中国地质调查局沈阳地质调查中心;
【分类号】：O657.63;TQ170

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