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SEMIQUANTITATIVE ANALYSIS WITH LASER ABLATION INDUCTIVELY COUPLED PLASMA MASS SPECTROMETRY

机译:激光烧蚀电感耦合等离子体质谱法的半定量分析

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摘要

Techniques for semiquantitative analysis of solid materials by laser ablation sample introduction for inductively coupled plasma mass spectrometry (ICPMS) are investigated. Under some ablation conditions, nonrepresentative subsampling or fractionation is a major source of analytical error, particularly for samples that have relatively low melting or boiling point components, Use of high laser fluence and reduced spatial overlap of laser pulses on the sample surface was found to reduce fractional ablation. improved analytical results were obtained by calibration with aqueous solution standards using two-channel sample introduction to give equivalent ICP conditions for ablated material and a solution standard, This method has a further advantage of not requiring solid reference standards, Semiquantitative analysis results for steel and glass SRMs obtained under matched plasma conditions are discussed.
机译:研究了用于电感耦合等离子体质谱法(ICPMS)的激光烧蚀样品引入对固体材料进行半定量分析的技术。在某些烧蚀条件下,无代表性的二次采样或分馏是分析误差的主要来源,尤其是对于熔点或沸点相对较低的样品,发现使用高激光通量和减少激光脉冲在样品表面的空间重叠分数消融。通过使用水溶液标准液进行校准,并使用两通道样品引入为烧蚀材料和溶液标准液提供了相同的ICP条件,从而获得了改进的分析结果。该方法的另一个优点是不需要固体参考标准液,对钢和玻璃进行半定量分析讨论了在匹配血浆条件下获得的SRM。

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