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ISO 7941:1988
Commercial propane and butane - Analysis by gas chromatography
The method specified applies to the quantitative determination of hydrocarbons in liquefied petroleum gas, excluding components whose concentrations are below O,1 % (m/m). It is applicable to the analysis of propane, butane and their commercial mixtures which may include saturated and unsaturated C2, C3, C4 and C5 hydrocarbons. It does not apply to "on-line" chromatography.
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International Organization for Standardization [iso]