ÖNORM EN 15470

This Standard specifies a method for the determination of the dissolved residual matter in liquefied petroleum gases (LPG). The dissolved residue is the amount of organic compounds, which are detectable by gas chromatography after evaporation of the sample at ambient temperature and then in an oven at 105 °C. The method is not suitable for detecting solid materials or for possibly high molecular weight polymers (> 1000). The advantages of the method are that a small quantity of LPG (50 gr to 75 gr) is required and the qualitative data available may give indication about the origin of the residues (gas-oil, lubricants, plasticizers, etc.). This method is being developed as a potential replacement of the commonly used method EN ISO 13757, but is safer and more environmentally friendly. In addition, this new method is more accurate.