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ISO 6145-8:2005

Current Revision

Gas analysis - Preparation of calibration gas mixtures using dynamic volumetric methods - Part 8: Diffusion method

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ISO 6145-8:2005 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.

ISO 6145-8:2005 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.


SDO ISO: International Organization for Standardization
Document Number ISO 6145
Publication Date Not Available
Language en - English
Page Count
Revision Level
Supercedes
Committee ISO/TC 158
Publish Date Document Id Type View
Not Available ISO 6145-8:2005 Revision