A rapid and reliable method for Pb isotopic analysis of peat and lichens by laser ablation-quadrupole-inductively coupled plasma-mass spectrometry for … [An article from: Analytica Chimica Acta]
A rapid and reliable method for Pb isotopic analysis of peat and lichens by laser ablation-quadrupole-inductively coupled plasma-mass spectrometry for … [An article from: Analytica Chimica Acta]
Last Updated on Tuesday, 13 September 2011 12:23 Written by Administrator Tuesday, 13 September 2011 12:23
A rapid and reliable method for Pb isotopic analysis of peat and lichens by laser ablation-quadrupole-inductively coupled plasma-mass spectrometry for … [An article from: Analytica Chimica Acta]
This digital document is a journal article from Analytica Chimica Acta, published by Elsevier in 2007. The article is delivered in HTML format and is available in your Amazon.com Media Library immediately after purchase. You can view it with any web browser.
Description:
An analytical protocol for rapid and reliable laser ablation-quadrupole (LA-Q)- and multi-collector (MC-) inductively coupled plasma-mass spectrometry (ICP-MS) analysis of Pb isotope ratios (^2^0^7Pb/^2^0^6Pb and ^2^0^8Pb/^2^0^6Pb) in peats and lichens is developed. This technique is applicable to source tracing atmospheric Pb deposition in biomonitoring studies and sample screening. Reference materials and environmental samples were dry ashed and pressed into pellets for introduction by laser ablation. No binder was used to reduce contamination. LA-MC-ICP-MS internal and external precisions were <1.1% and <0.3%, respectively, on both ^2^0^7Pb/^2^0^6Pb and ^2^0^8Pb/^2^0^6Pb ratios. LA-Q-ICP-MS internal precisions on ^2^0^7Pb/^2^0^6Pb and ^2^0^8Pb/^2^0^6Pb ratios were lower with values for the different sample sets <14.3% while external precisions were <2.9%. The level of external precision acquired in this study is high enough to distinguish between most modern Pb sources. LA-MC-ICP-MS measurements differed from thermal ionisation mass spectrometry (TIMS) values by 1% or less while the accuracy obtained using LA-Q-ICP-MS compared to solution MC-ICP-MS was 3.1% or better using a run bracketing (RB) mass bias correction method. Sample heterogeneity and detector switching when measuring ^2^0^8Pb by Q-ICP-MS are identified as sources of reduced analytical performance.
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Tags: ablationquadrupoleinductively, Acta, Analysis, Analytica, article, Chimica, Coupled, From, isotopic, laser, lichens, method'', peat, PlasmaMass, rapid, reliable, Spectrometry
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