Development of signal smoothing device for precise elemental analysis using laser ablation-ICP-mass spectrometry
Development of signal smoothing device for precise elemental analysis using laser ablation-ICP-mass spectrometry
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DOI：
10.1039/b402493a
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发表时间：
2004-01-01
影响因子：
3.4
通讯作者：
Hirata, T
中科院分区：
文献类型：
--
作者：
Tunheng, A;Hirata, T
一种新的信号平滑装置（稳定器）已被开发出来，用于对通过激光烧蚀-ICP-质谱法获得的小陨石坑尺寸的固体样品进行元素和同位素比分析。使用本研究开发的稳定器，即使重复率为 2 Hz，也没有发现信号强度振荡。通过严格测试信号强度的稳定性以及信号平滑效率和信号衰减时间之间的关系来评估稳定器的有效性。通过对 NIST SRM 610 玻璃标准品中的 7 种同位素进行重复分析来评估元素和同位素比测量的精度。元素比率和同位素比率的重复性低至 2-4% (2 SD, n = 10)。使用稳定器的另一个重要优点是，通过采用低重复率烧蚀方法的激光烧蚀成功地减少了元素分馏，这是分析误差的一大来源。
A new signal smoothing device ( stabilizer) has been developed for elemental and isotopic ratio analyses of solid samples from small crater sizes obtained by a laser ablation-ICP-mass spectrometry. With the stabilizer developed in this study, no oscillation of signal intensity was found, even with the repetition rate of 2 Hz. The effectiveness of the stabilizer was evaluated by vigorous testing of the stability in signal intensity and the relationship between signal smoothing efficiency and signal decay time. The precision of elemental and isotopic ratio measurements was evaluated by the repeated analysis of 7 isotopes from NIST SRM 610 glass standard. The resulting repeatability in elemental ratio and isotopic ratio was as low as 2-4% (2 SD, n = 10). Another important advantage of using the stabilizer is that the elemental fractionation, which was a large source of analytical error, was successfully reduced by the laser ablation with low repetition rate ablation approach.