ISO/DIS 20411
Résumé
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.
Informations générales
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État actuel: ProjetStade: DIS enregistré [40.00]
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Edition: 2
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Comité technique :ISO/TC 201/SC 6ICS :71.040.40
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Cycle de vie
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Précédemment
PubliéeISO 20411:2018
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Actuellement
