Canadian Society of Forensic Science Journal · 2015 · 24 citations · 16 references
PharmacyChemistryAnalytical ChemistryElemental AnalysisMass Spectrometric AnalysisElemental Composition AnalysisInorganic Elemental AnalysisInstrumental AnalysisMass Spectrometric Elemental AnalysisMass SpectrometryTrace Element AnalysisAnalytical Characterization Of GlassFloat GlassGlass CompositionLaser Ablation Inductively Coupled Plasma Mass SpectrometryLaser Ablation Mass SpectrometryType Ii ErrorType Ii Error AnalysisType Ii Error Rate
Samples of float glass were analyzed by Laser Ablation-Inductively Coupled Plasma-Mass Spectrometry (LA-ICP-MS) in order to develop an exclusion criterion for the discrimination of float glass sources based on elemental composition. Using a trace element menu consisting of Ti, Mn, Rb, Sr, Zr, Ba, La, Ce, Nd and Pb, 48 samples from a single float glass pane and 82 casework samples from different float glass sources were analyzed to assess Type I and Type II error rates by means of pairwise comparisons of element concentrations. A modified four standard deviation exclusion criterion, with minimum relative standard deviations of 4% or 5% per element, yielded the lowest Type I and Type II error rates of 0.27% and 0.11%, respectively. The use of LA-ICP-MS in combination with refractive index (RI) measurement provided complete discrimination of all of the 82 float glass samples.
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Nicholas J.G. Pearce, William T. Perkins, John A. Westgate et al. · Geostandards and Geoanalytical Research · 1997 · 2.8K citations