This part of ISO 6145 specifies a dynamic method using diffusion for the preparation of calibration gasmixtures 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 16
DS/EN ISO 6145-8-2008由丹麦标准化协会 DK-DS 发布于 2008-11-05,并于 2008-11-05 实施。
DS/EN ISO 6145-8-2008在国际标准分类中归属于: 71.040.40 化学分析。
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