ISO 17862:2022
Surface chemical analysis — Secondary ion mass spectrometry — Linearity of intensity scale in single ion counting time-of-flight mass analysers
OVERVIEW
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.
COMMENTS
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PRODUCT DETAILS
| Status | Current |
|---|---|
| Edition | 2022 |
| No. of Pages | 18 |
| ICS Classification | 71.040.40 Chemical analysis |
| Committee | ISO/TC 201/SC 6 |
| Available for Purchase | For sale in Singapore only |
| Adoption | ISO |