On-line isotope dilution in laser ablation inductively coupled plasma mass spectrometry using a microflow nebulizer inserted in the laser ablation chamber

被引:61
作者
Pickhardt, C
Izmer, AV
Zoriy, MV
Schaumlöffel, D
Becker, JS [1 ]
机构
[1] Res Ctr Juelich, Cent Div Analyt Chem, D-52425 Julich, Germany
[2] CNRS, Grp Bioinorgan Analyt Chem, UMR 5034, F-64053 Pau, France
关键词
microflow nebulizer; laser ablation; ICP-MS; on-line isotope dilution analysis;
D O I
10.1016/j.ijms.2005.11.001
中图分类号
O64 [物理化学(理论化学)、化学物理学]; O56 [分子物理学、原子物理学];
学科分类号
070203 ; 070304 ; 081704 ; 1406 ;
摘要
Laser ablation ICP-MS (inductively coupled plasma mass spectrometry) is becoming one of the most important analytical techniques for fast determination of trace impurities in solid samples. Quantification of analytical results requires matrix-matched standards, which are in some cases (e.g., high-purity metals, proteins separated by 2D gel electrophoresis) difficult to obtain or prepare. In order to overcome the quantification problem a special arrangement for on-line solution-based calibration has been proposed in laser ablation ICP-MS by the insertion of a microflow nebulizer in the laser ablation chamber. This arrangement allows an easy, accurate and precise quantification by on-line isotope dilution using a defined standard solution with an isotope enriched tracer nebulized to the laser-ablated sample material. An ideal matrix matching in LA-ICP-MS is therefore obtained during the measurement. The figures of merit of this arrangement with a microflow nebulizer inserted in the laser ablation chamber and applications of on-line isotope dilution in LA-ICP-MS on two different types of sample material (NIST glass SRM 612 and NIST apple leaves SRM 1515) will be described. (c) 2005 Elsevier B.V. All rights reserved.
引用
收藏
页码:136 / 141
页数:6
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