石油制品.机动车燃料的硫含量的测定.能量分散X射线荧光光谱法

[中文适用范围]： 本国际标准规定了测定车用汽油（包括含氧量高达 2.7%（m/m）的汽油）和柴油（包括柴油）的硫含量的能量色散 X 射线荧光（EDXRF）测试方法。 含有高达 5% (V/V) 的脂肪酸甲酯 (FAME)，硫含量在 30 mg/kg 至 500 mg/kg 范围内。 其他产品可按本试验方法进行分析和测定其他硫含量；然而，本国际标准没有为汽车燃料以外的产品以及超出指定范围的结果建立精确数据。 由于光谱重叠的原因，本国际标准不适用于含铅车用汽油、含钾 8 mg/kg 至 20 mg/kg 的铅替代汽油，或含铅、硅、磷、钙、钾或钾的产品和原料。 浓度大于所测硫浓度十分之一的卤化物。 注：就本国际标准而言，术语“%（m/m）”和“%（V/V）”分别用于表示材料的质量分数和体积分数。 [外文原描述]： ISO 20847:2004 specifies an energy dispersive X-ray fluorescence (EDXRF) test method for the determination of the sulfur content of motor gasolines, including those containing up to 2,7 % ( m/m ) oxygen, and of diesel fuels, including those containing up to 5 % ( V/V ) fatty acid methylester (FAME), having sulfur contents in the range 30 mg/kg to 500 mg/kg. Other products may be analysed and other sulfur contents may 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 ISO 20847:2004. For reasons of spectral overlap, ISO 20847:2004 is not applicable to leaded motor gasolines, lead-replacement gasolines containing 8 mg/kg potassium to 20 mg/kg potassium, or to products and feedstocks containing lead, silicon, phosporus, calcium, potassium or halides at concentrations greater than one-tenth of the concentration of sulfur measured.