石油产品.汽车燃料的硫含量的测定.紫外荧光法(ISO 20846-2011).德文版 EN ISO 20846-2011

[中文适用范围]： 本国际标准规定了一种紫外荧光法，用于测定含氧量高达 3.7%（质量分数）的汽油（包括含乙醇量高达 10%（体积分数）的汽油）和含脂肪酸甲酯（FAME）量高达 10%（体积分数）的柴油中的硫含量。该方法适用于硫含量在 3 mg/kg 至 500 mg/kg 范围内的测定。其他产品和硫含量也可用此方法测定，但本国际标准中给出的精密度数据仅针对指定范围内的车用燃料。卤素在浓度高于约 3500 mg/kg 时会干扰测定。 注 1：炼油和化工工业过程中使用的某些催化剂可能会因进料产品中含有微量含硫物质而中毒。 注 2：本测试方法可用于测定炼油中间产品中的硫，也可用于控制最终产品中的硫含量。 注 3：为本文档的目的，表示物质质量分数时使用“%（m/m）”，表示物质体积分数时使用“%（V/V）”。 注 4：乙醇中的硫酸盐杂质虽然与乙醇中的有机硫具有不同的换算系数，但其值非常接近。 注 5：建议检查并考虑氮的干扰。当发现添加了含氮点火改进剂（如烷基硝酸酯，以 2-乙基己基硝酸酯 (EHN) 形式添加）的柴油中的硫含量时，这一点尤为重要。例如，添加 2000 mg/kg EHN 且现有硫含量为 10 mg/kg 的柴油，会导致测得的硫含量增加约 0 mg/kg 至 1.7 mg/kg。 [外文原描述]： This document specifies an ultraviolet (UV) fluorescence test method for the determination of the sulfur content of the following products: — having sulfur contents in the range 3 mg/kg to 500 mg/kg, — motor gasolines containing up to 3,7 % ( m / m ) oxygen [including those blended with ethanol up to about 10 % ( V / V )], — diesel fuels, including those containing up to about 30 % ( V / V ) fatty acid methyl ester (FAME), — having sulfur contents in the range of 3 mg/kg to 45 mg/kg, — synthetic fuels, such as hydrotreated vegetable oil (HVO) and gas to liquid (GTL). Other products can be analysed and other sulfur contents can be determined according to this test method, however, no precision data for products other than automotive fuels and for results outside the specified range have been established for this document. Halogens interfere with this detection technique at concentrations above approximately 3 500 mg/kg. NOTE 1 Some process catalysts used in petroleum and chemical refining can be poisoned when trace amounts of sulfur-bearing materials are contained in the feedstocks. NOTE 2 This test method can be used to determine sulfur in process feeds and can also be used to control sulfur in effluents. NOTE 3 For the purposes of this document, "% ( m/m )" and "% ( V/V )" are used to represent the mass fraction, w, and the volume fraction, φ , of a material respectively. NOTE 4 Sulfate species in ethanol do not have the same conversion factor of organic sulfur in ethanol. Nevertheless, sulfates have a conversion factor close to that of organic sulfur. NOTE 5 Nitrogen interference can occur, see 6.5 for further guidance.