ISO 17862:2013

Withdrawn (Edition 1, 2013)

New version available: ISO 17862:2022

Abstract

ISO 17862:2014 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. ISO 17862:2014 can also be used to confirm the validity of instruments in which the dead-time correction is already made but in which further increases can or cannot be possible.

General information

Status
: Withdrawn

Publication date
: 2013-12

Stage
: Withdrawal of International Standard [95.99]
Edition
: 1

Number of pages
: 25
Technical Committee :
ISO/TC 201/SC 6

ICS :
71.040.40
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