International Standard
ISO 17862:2022
Surface chemical analysis — Secondary ion mass spectrometry — Linearity of intensity scale in single ion counting time-of-flight mass analysers
Reference number
ISO 17862:2022
Edition 2
2022-09
© ISO 2024
International Standard
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Published (Edition 2, 2022)

ISO 17862:2022

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Language
CHF 96
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Abstract

This document specifies a method for determining the maximum count rate for an acceptable limit of divergence from linearity of the intensity scale in single ion counting time-of-flight (TOF) secondary ion mass spectrometers using a test based on isotopic ratios in spectra from poly(tetrafluoroethylene) (PTFE). It also includes a method to correct for intensity nonlinearity arising from intensity lost from a microchannel plate (MCP) or scintillator and photomultiplier followed by a time-to-digital converter (TDC) detection system caused by secondary ions arriving during its dead-time. The correction can increase the intensity range for 95 % linearity by a factor of up to more than 50 so that a higher maximum count rate can be employed for those spectrometers for which the relevant correction formulae have been shown to be valid.

General information

  • Status
     : Published
    Publication date
     : 2022-09
    Stage
    : International Standard published [60.60]
  • Edition
     : 2
    Number of pages
     : 18
  • Technical Committee :
    ISO/TC 201/SC 6
    ICS :
    71.040.40 
  • RSS updates

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