该文件规定了波长分散X射线荧光（WDXRF）测试方法，用于测定液体、均匀的汽车燃料的硫含量从5毫克\/公斤到500毫克\/公斤，其最大氧含量为3.7%（m\/m）。本产品系列包括:-含约30%（V\/V）脂肪酸甲酯（FAME）的柴油，-含有10%（V\/V）乙醇的机动汽油，-合成燃料，如加氢植物油（HVO）和气-液（GTL），硫含量在5 mg\/kg至45 mg\/kg之间。含氧量较高的产品显示出显著的基质效应，例如纯FAME用作生物柴油，然而，当遵循相应的程序时，可以分析纯FAME（见5.3和8.1）。其他产品可采用本试验方法进行分析，但本文件中未确定上述产品以外产品的精度数据。注1:样品稀释后，可测定大于500 mg\/kg的硫含量，但未确定稀释样品的精密度。注2:在本文件中，“（m\/m）”和“%（V\/V）”分别表示材料的质量分数w和体积分数φ。

This document specifies a wavelength-dispersive X-ray fluorescence (WDXRF) test method for the determination of the sulfur content of liquid, homogeneous automotive fuels from 5 mg/kg to 500 mg/kg, which have a maximum oxygen content of 3,7 % (m/m). This product range covers: — diesel fuels containing up to about 30 % (V/V) fatty acid methyl esters (FAME), — motor gasolines containing up to about 10 % (V/V) ethanol, — synthetic fuels such as hydrotreated vegetable oil (HVO) and gas to liquid (GTL) having sulfur contents in the range of 5 mg/kg to 45 mg/kg. Products with higher oxygen content show significant matrix effects, e.g. pure FAME used as biodiesel, nevertheless, pure FAME can be analysed when the corresponding procedures are followed (see 5.3 and 8.1). Other products can be analysed with this test method, though precision data for products other than those mentioned have not been established for this document. NOTE 1 Sulfur contents higher than 500 mg/kg can be determined after sample dilution, however, the precision was not established for diluted samples. NOTE 2 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.