This International standard specifies a gas chromatographic method for the quantative determination of hydrocarbons in liquified petroleum gas (LPG), excluding components whose concentrations are below 0,1% (m/m). It is applicable to the analysis of propane, butane and their commerical mixtures, which may include saturated and unsaturated C2, C3, C4 and C5 hydrocarbons. It does not apply to ""on-line"" chromatography.