Details

Autor(en) / Beteiligte

• Nambiar, Romi
• Müller, Wolfgang
• Evans, David

Titel

Evaluating accuracy improvements of laser ablation ICPMS element analysis in silicate glasses and carbonates downhole fractionation correction - an old problem re-assessed

Ist Teil von

• Journal of analytical atomic spectrometry, 2024-06, Vol.39 (6), p.1454-146

Erscheinungsjahr

2024

Link zum Volltext

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• Non-matrix-matched calibration of laser ablation ICPMS (trace/major) element data is a common quantification strategy. However, LA sampling is associated with downhole elemental fractionation, potentially causing inaccuracies if the magnitude of fractionation between the sample and reference material (RM) differs. Here, we estimate fractionation factors (FFs) for different elements (El) in a range of RMs relative to NIST SRM610/612 (FF El/Ca-NIST ) and evaluate element-specific corrections for downhole fractionation using these measured FF El/Ca-NIST . Significantly different mean El/Ca values were observed before and after correction, particularly for the alkali elements (all RMs), and B, Fe, and Zn (some RMs), notably improving accuracy, especially for the alkali elements. In cases where this methodology does not result in an accuracy improvement, this may help identify underlying issues in reported/reference values for RMs, given that this phenomenon should be accounted for. Overall, we recommend considering routine assessment of FFs and applying a FF correction to enhance data quality. Correction for down-hole fractionation improves non-matrix matched laser ablation trace element data quality.