DIN EN ISO 6145-8:2008
气体分析.动态容量法制备校准气体混合物.第8部分:扩散方法
Gas analysis - Preparation of calibration gas mixtures using dynamic volumetric methods - Part 8: Diffusion method (ISO 6145-8:2005); English version of DIN EN ISO 6145-8:2008-11
- 标准号
- DIN EN ISO 6145-8:2008
- 发布
- 2008年
- 发布单位
- 德国标准化学会
- 当前最新
- DIN EN ISO 6145-8:2008
- 引用标准
- ISO 6145-7
- 适用范围
- This part of ISO 6145 specifies a dynamic method using diffusion for the preparation of calibration gas mixtures containing component mole fractions ranging from 10 9 to 10 3. A relative expanded uncertainty of measurement, U, obtained by multiplying the relative combined standard uncertainty by a coverage factor k = 2, of not greater than _+ 2 % can be achieved by using this method, By keeping the path between the diffusion source and place of use as short as possible, the method can be applied for the generation of low-concentration calibration gases of organic components that are liquid at room temperature, with boiling points ranging from about 40 ~C to 160 ~C. This part of ISO 6145 is applicable not only for the generation of calibration gas mixtures of a wide range of hydrocarbons at ambient and indoor air concentration levels, but also for the generation of low-concentration gas mixtures of water.
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