准同时到达（QSA）计算不足的 SIMS 数据校正程序及误用的后果

IF 2.7 2区地球科学 Q2 GEOCHEMISTRY & GEOPHYSICS

Geostandards and Geoanalytical Research Pub Date : 2024-07-21 DOI:10.1111/ggr.12570

Clive Jones, David A. Fike

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引用次数: 0

摘要

同位素地球化学要求使用二次离子质谱法（SIMS）测量的同位素比值具有最佳精度和准确性。在某些分析条件下，当使用电子倍增探测器时，由于准同时到达（QSA）第一个 dynode，二次离子可能会计算不足。相关的 QSA 校正对原始测量同位素比值的相对影响可高达 70 permil 或更多。因此，不应用校正或误用校正会导致已公布的同位素比值数据严重不准确。本文介绍了后者的示例和影响，以及 QSA 计算不足校正的直接程序。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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SIMS Data Correction Procedure for Quasi-Simultaneous Arrival (QSA) Under-counting and Ramifications of Misapplication

Isotope geochemistry requires isotope ratios measured using secondary ion mass spectrometry (SIMS) to be made with optimal precision and accuracy. Under some analytical conditions when using electron multiplier detectors, secondary ions may be under-counted because of quasi-simultaneous arrival (QSA) at the first dynode. The relative magnitude of the associated QSA correction to raw measured isotopic ratios can be up to seventy permil or more. Therefore, not applying the correction, or misapplication of it could lead to significant inaccuracies in published isotope ratio data. Examples and ramifications of the latter are described in addition to a straightforward procedure for QSA under-counting correction.

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来源期刊

Geostandards and Geoanalytical Research 地学-地球科学综合

CiteScore

7.10

自引率

18.40%

发文量

审稿时长

>12 weeks

期刊介绍： Geostandards & Geoanalytical Research is an international journal dedicated to advancing the science of reference materials, analytical techniques and data quality relevant to the chemical analysis of geological and environmental samples. Papers are accepted for publication following peer review.