石油产品 - 汽车燃料中硫含量的测定 - 紫外荧光法

[中文适用范围]： 本文件规定了一种紫外 (UV) 荧光测试方法，用于测定以下产品的硫含量： — 硫含量在 3 mg/kg 至 500 mg/kg 范围内， — 含氧量高达 3.7 % (m/m) 的汽油 [包括与乙醇混合量高达约 10 % (V/V) 的汽油]， — 柴油，包括脂肪酸甲酯 (FAME) 含量高达约 30 % (V/V) 的柴油， — 硫含量在 3 mg/kg 至 45 mg/kg 范围内， — 合成燃料，如加氢植物油 (HVO) 和气转液 (GTL)。 可以根据此测试方法分析其他产品并测定其他硫含量，但是，本文件尚未建立除汽车燃料以外的产品和指定范围之外的结果的精度数据。 浓度超过约 3500 mg/kg 的卤素会干扰该检测技术。注 1：当石油和化学精炼原料中含有微量含硫物质时，某些石油和化学精炼工艺中使用的催化剂可能会中毒。 注 2：本测试方法可用于测定工艺进料中的硫，也可用于控制废水中的硫。 注 3：就本文件而言，“% (m/m)”和“% (V/V)”分别用于表示材料的质量分数 w 和体积分数 φ。 注 4：乙醇中的硫酸盐物质的换算系数与乙醇中的有机硫不同。不过，硫酸盐的换算系数接近有机硫。 注 5：可能会出现氮干扰，有关进一步指导，请参见 6.5。 [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.