DIN EN ISO 6145-10-2008 气体分析.用动态容积法制备校准气体混合物.第10部分:渗透法

标准号：DIN EN ISO 6145-10-2008
中文标准名称：气体分析.用动态容积法制备校准气体混合物.第10部分:渗透法
英文标准名称：Gas analysis - Preparation of calibration gas mixtures using dynamic volumetric methods - Part 10: Permeation method (ISO 6145-10:2002); English version of DIN EN ISO 6145-10:2008-11
标准类型：G86
发布日期：2008/11/1 12:00:00
实施日期：1999/12/31 12:00:00
中国标准分类号：G86
国际标准分类号：71.040.40
引用标准：ISO 6145-1
适用范围：This part of ISO 6145 specifies a dynamic method using permeation membranes for the preparation of calibrationgas mixtures containing component mole fractions ranging from 10~ and 106. A relative expanded uncertainty of2,5 % of the component mole fraction can be achieved using this method In the mole fraction range considered, itis difficult to maintain some gas mixtures, for example in cylinders, in a stable state It is therefore desirable toprepare the calibration gas immediately before use, and to transfer it by the shortest possible path to the placewhere it is to be used. This technique has been successfully applied in generating low content calibration gasmixtures of, for example, sulfur dioxide (SO2), nitrogen dioxide (NO2) and benzene (C6H6) in air.If the carrier gas flow is measured as a gas mass-flow, the preparation of calibration gas mixtures using permeationtubes is a dynamic-gravimetric method which gives contents in mole fractions.