etroleum products;Residue tests;Residues;Sampling methods;Test equipment;Test procedures;Testing;Testing conditions【摘要】: This European Standard specifies a method for determining the dissolved residual matter in liquefiedpetroleum gases (LPG), in the range of 40 mg/kg to 100 mg/kg. Higher concentrations can be determined byadjusting the sample size.The dissolved residue is the amount of organic compounds that are detectable by gas chromatography afterevaporation of the sample at ambient temperature and then in an oven at 105 ℃.This method is not suitable for detecting solid materials or for possibly high molecular weight polymers(> 1 000 g/mol).The advantages of this method are that a small quantity of LPG (50 g to 75 g) is required and the qualitativedata available may indicate the origin of the residues (gas-oil, lubricants, plasticizers, etc.).This method has been developed as a potential replacement of the commonly used method described inEN ISO 13757 [1], but is safer and more environmentally friendly. In addition, this new method is moreaccurate.The precision data of the method have been determined from 20 mg/kg to 100 mg/kg. For a higher content ofresidue, the precision has not been tested, but remains of lesser interest as typical specifications are in therange of 20 mg/kg to 100 mg/kg.NOTE An alternative European Standard, EN 15471 [2], specifies a gravimetric method, which has the same scopeand slightly worst fidelity data.【中国标准分类号】: E31【国际标准分类号】: 75_160_20【页数】: 17P.;A4【正文语种】: 英语 | 欢迎光临 世界资料网论坛 (http://bbs.infoeach.com/) | Powered by Discuz! X2.5 |