Spatial inhomogeneity of metals in particulate matter on ambient air filters determined by LA-ICP-MS and comparison with acid digestion ICP-MS

被引：16

作者：

Brown, Richard J. C. ^{[1
]}

Jarvis, Kym. E. ^{[2
]}

Disch, Benoit A. ^{[2
]}

Goddard, Sharon L. ^{[1
]}

Brown, Andrew S. ^{[1
]}

机构：

[1] Natl Phys Lab, Analyt Sci Team, Teddington TW11 0LW, Middx, England

[2] Univ London Imperial Coll Sci Technol & Med, Ctr Environm Policy, Ascot SL5 7PY, Berks, England

来源：

JOURNAL OF ENVIRONMENTAL MONITORING | 2009年 / 11卷 / 11期

关键词：

PLASMA-MASS SPECTROMETRY; LASER-ABLATION; AEROSOLS; CALIBRATION;

D O I：

10.1039/b911441f

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

Laser ablation inductively coupled plasma-mass spectrometry (LA-ICP-MS) has been used to examine the spatial distribution of metals in particulate matter on ambient air filters. The implications of the inhomogeneous distribution observed for the sub-sampling of such filters for multiple analyses have been discussed. It has been shown that large biases in measured values may occur unless the position and size of the sub-sample are chosen judiciously. Additionally, LA-ICP-MS has been compared against acid digestion ICP-MS as an alternative method for the determination of metals in particulate matter. It has been shown that the majority of variation in the LA-ICP-MS sensitivity accrues from small differences in the positioning of samples.

引用

页码：2022 / 2029

页数：8

共 23 条

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