ISO 17862:2022

Published (Edition 2, 2022)

ISO 17862:2022

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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
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