731,733 标准查询与下载

DS/EN 13:1976 汽油铅含量的测定．铬酸盐容积法

This European Standard desoribes a method for the volumetric determination of the total lead content of motor and aviation gasoline blended with lead alkyls (tetraethyllead or tetramethyllead, trimethylethyllead, dimethyldiethyllead,methyltriethyllead, or mixtures thereof) within the concentration range of 0. 05 to 1.3 g of lead per litre.

Determination of lead content of gasoline. Volumetric chromate method

DS/EN 5:1976 石油产品.发动机汽油和航空燃料.含胶的测定.喷射蒸发法

1 This European Standard describes a method for the determination of the existent gum in motor gasoline, aviation gasoline, volatile distillates used in their preparation and aircraft turbine fuel at the time of test. 2 The determination of the unwashed gum content of motor gasoline is also described.

Determination of existent gum in fuels by jet evaporation

DS/EN 7:1976 石油产品中灰分的测定

This European Standard describes a method for the determination of the ash, (in the range 0. 01 to 0. 20% (m/m) from distillate and residual fuel oils, crude oils, lubricating oils, waxes, and other petroleum products, in which any ash-forming materials present are normally considered to be undesirable impurities or contaminants (Note 1). The method is limited to petroleum products which are free from added ash-forming additives, including certain phosphorus compounds (Note 2). NOTE 1. With certain types of sample the test result may not account quantitatively for all the metal compounds capable of forming an ash.. This is particularly true in the case of distillate oils for which it is necessary to use a special procedure if it is desired to determine the metal compounds. NOTE 2. This method is not intended for the analysis of unused lubricating oils containing additives; for such samples use a corresponding national standard based on CEN 19/U11-1971 -Test for sulphated ash from lubricating oils and additives; neither is it intended for the analysis of lubricating oils containing lead nor for used engine crankcase oils.

Determination of ash from petroleum products