Campus Units

Chemistry, Ames Laboratory

Document Type

Article

Publication Version

Published Version

Publication Date

5-5-2004

Journal or Book Title

Analytical Chemistry

Volume

76

Issue

11

First Page

3119

Last Page

3125

DOI

10.1021/ac0345042

Abstract

Laser ablation inductively coupled plasma mass spectrometry (LA-ICPMS) is used with two variations of principal components analysis (PCA) for objective, routine comparisons of forensic materials without time-consuming and destructive sample dissolution. The relative concentrations of trace elements in a solid sample are examined to provide a “fingerprint” composition that can be used for identification and source matching of the material. Residue samples are matched to bulk materials using PCA. Variation of laser focus and PCA are also used to diagnose the severity of elemental fractionation in two metal samples that are prone to fractionation, brass and steel. Such fractionation remains the most significant limitation for accurate quantitative analyses by LA-ICPMS.

Comments

Reprinted (adapted) with permission from Analytical Chemistry 76 (2004): 3119, doi: 10.1021/ac0345042. Copyright 2004 American Chemical Society.

Copyright Owner

American Chemical Society

Language

en

File Format

application/pdf

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