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

Clive Jones; David A. Fike

doi:10.1111/ggr.12570

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

Clive Jones, David A. Fike

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1 Scopus citations

Abstract

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.

Original language	English
Pages (from-to)	613-618
Number of pages	6
Journal	Geostandards and Geoanalytical Research
Volume	48
Issue number	3
DOIs	https://doi.org/10.1111/ggr.12570
State	Published - Sep 2024

Keywords

QSA correction method
SIMS
quasi-simultaneous arrival
secondary ion mass spectrometry

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10.1111/ggr.12570

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

abstract = "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.",

keywords = "QSA correction method, SIMS, quasi-simultaneous arrival, secondary ion mass spectrometry",

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T1 - SIMS Data Correction Procedure for Quasi-Simultaneous Arrival (QSA) Under-counting and Ramifications of Misapplication

AU - Jones, Clive

AU - Fike, David A.

PY - 2024/9

Y1 - 2024/9

N2 - 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.

AB - 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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KW - SIMS

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KW - secondary ion mass spectrometry

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JF - Geostandards and Geoanalytical Research

IS - 3

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

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