ISO 20411:2018

Status : Published (To be revised)

This standard will be replaced by ISO/AWI 20411

	Format	Language
std 1 92	PDF + ePub
std 2 92	Paper

CHF92

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Abstract

ISO 20411:2018 specifies a method for determining the maximum count rate for an acceptable limit of divergence from linearity of the intensity scale in pulse counting magnetic sector-type secondary ion mass spectrometers or quadrupole secondary ion mass spectrometers. It uses a test based on depth profile analysis of two isotopes in a reference material which has a gradual concentration change between low and high concentration regimes. It also includes a correction method for saturated intensity caused by the dead time of the detector. The correction can increase the intensity range for 95 % linearity so that a higher maximum count rate can be employed for those spectrometers for which the relevant correction equations have been shown to be valid.

ISO 20411:2018 does not apply to time of flight mass spectrometers.

ISO 20411:2018 is only applicable to elements with minor isotopes. It is not applicable if the element is monoisotopic or contains isotopes with equal abundances.

General information

Status
: Published

Publication date
: 2018-03

Stage
: International Standard to be revised [90.92]
Edition
: 1

Number of pages
: 15
Technical Committee :
ISO/TC 201/SC 6

ICS :
71.040.40
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