Cookies
Potrebujeme váš súhlas na využitie jednotlivých dát, aby sa vám okrem iného mohli ukazovať informácie týkajúce sa vašich záujmov. Súhlas udelíte kliknutím na tlačidlo „OK“.
ISO 20411:2018
Surface chemical analysis — Secondary ion mass spectrometry — Correction method for saturated intensity in single ion counting dynamic secondary ion mass spectrometry
NORMA vydaná dňa 9.3.2018
Informácie o norme:
Označenie normy: ISO 20411:2018
Dátum vydania normy: 9.3.2018
Kód tovaru: NS-810252
Počet strán: 15
Približná hmotnosť: 45 g (0.10 libier)
Krajina: Medzinárodná technická norma
Kategória: Technické normy ISO
Kategórie - podobné normy:
Anotácia textu normy ISO 20411:2018 :
Description / 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.
Doporučujeme:
