1.1 本试验方法包括测定石油和石油产品中的总硫，这些产品为单相，在环境条件下为液体，可在中等热量下液化，或可溶于碳氢化合物溶剂。这些材料可以包括柴油、喷气燃料、煤油、其他馏分油、石脑油、渣油、润滑基础油、液压油、原油、无铅汽油、汽油-乙醇混合物和生物柴油。 1.2 该试验方法的范围在PLOQ值（通过符合实践的程序计算 D6259 )3 mg/kg总硫和循环中最高水平的样品，4.6%（重量）总硫。 注1: 此测试方法所涵盖的仪器的灵敏度可能会有所不同。对于能够测量较低水平的WDXRF仪器，可以单独确定硫浓度低于3 mg/kg时试验方法的适用性，但本试验方法的精度不适用。 1.2.1 特定实验室仪器的定量限（LOQ）和方法精度值取决于仪器源功率（低功率或高功率）、样品类型以及实验室为执行该方法而制定的实践。 1.3 应稀释含硫量超过4.6%的样品，使稀释材料的硫浓度在本试验方法的范围内。稀释后的样品的误差可能高于第节所示的误差 15 比未稀释的样品。 1.4 挥发性样品（如高蒸气压汽油或轻质碳氢化合物）可能不符合规定的精度，因为在分析过程中会选择性损失轻质材料。 1.5 该测试方法中的一个基本假设是标准矩阵和样本矩阵匹配良好，或者考虑了矩阵差异（参见 13.2 ). 基质失配可能是由样品和标准品之间的C/H比差异或其他干扰杂原子或物种的存在引起的（见 表1 ). 1.6 以国际单位制表示的数值应视为标准。本标准不包括其他计量单位。 1.7 本标准并不旨在解决与其使用相关的所有安全问题（如有）。本标准的使用者有责任在使用前制定适当的安全、健康和环境实践，并确定监管限制的适用性。 1.8 本国际标准是根据世界贸易组织技术性贸易壁垒委员会发布的《关于制定国际标准、指南和建议的原则的决定》中确立的国际公认的标准化原则制定的。 ====意义和用途====== 5.1 该测试方法可在最少的样品制备下快速准确地测量石油和石油产品中的总硫。典型的分析时间为每个样品1分钟至2分钟。 5.2 许多石油产品的质量与硫含量有关。硫浓度知识对于加工目的是必要的。联邦、州和地方机构也颁布了限制某些燃料中硫含量的法规。 5.3 该试验方法提供了一种确定石油或石油产品硫含量是否符合规范或监管限制的方法。 5.4 当本试验方法应用于基质与本试验方法中规定的白油校准材料明显不同的石油材料时，第节中的注意事项和建议 6. 在解释结果时应遵守。 注2: 试验方法规定的设备 D2622 往往比替代测试方法（如测试方法）所需的成本更高 D4294 。有关替代测试方法，请参阅ASTM标准索引。

1.1 This test method covers the determination of total sulfur in petroleum and petroleum products that are single-phase and either liquid at ambient conditions, liquefiable with moderate heat, or soluble in hydrocarbon solvents. These materials can include diesel fuel, jet fuel, kerosene, other distillate oil, naphtha, residual oil, lubricating base oil, hydraulic oil, crude oil, unleaded gasoline, gasoline-ethanol blends, and biodiesel. 1.2 The range of this test method is between the PLOQ value (calculated by procedures consistent with Practice D6259 ) of 3 mg/kg total sulfur and the highest level sample in the round robin, 4.6 % by weight total sulfur. Note 1: Instrumentation covered by this test method can vary in sensitivity. The applicability of the test method at sulfur concentrations below 3 mg/kg may be determined on an individual basis for WDXRF instruments capable of measuring lower levels, but precision in this test method does not apply. 1.2.1 The values of the limit of quantitation (LOQ) and method precision for a specific laboratory’s instrument depends on instrument source power (low or high power), sample type, and the practices established by the laboratory to perform the method. 1.3 Samples containing more than 4.6 % by mass sulfur should be diluted to bring the sulfur concentration of the diluted material within the scope of this test method. Samples that are diluted can have higher errors than indicated in Section 15 than non-diluted samples. 1.4 Volatile samples (such as high vapor pressure gasolines or light hydrocarbons) may not meet the stated precision because of selective loss of light materials during the analysis. 1.5 A fundamental assumption in this test method is that the standard and sample matrices are well matched, or that the matrix differences are accounted for (see 13.2 ). Matrix mismatch can be caused by C/H ratio differences between samples and standards or by the presence of other interfering heteroatoms or species (see Table 1 ). 1.6 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard. 1.7 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use. 1.8 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee. ====== Significance And Use ====== 5.1 This test method provides rapid and precise measurement of total sulfur in petroleum and petroleum products with a minimum of sample preparation. A typical analysis time is 1 min to 2 min per sample. 5.2 The quality of many petroleum products is related to the amount of sulfur present. Knowledge of sulfur concentration is necessary for processing purposes. There are also regulations promulgated in federal, state, and local agencies that restrict the amount of sulfur present in some fuels. 5.3 This test method provides a means of determining whether the sulfur content of petroleum or a petroleum product meets specification or regulatory limits. 5.4 When this test method is applied to petroleum materials with matrices significantly different from the white oil calibration materials specified in this test method, the cautions and recommendations in Section 6 should be observed when interpreting results. Note 2: The equipment specified for Test Method D2622 tends to be more expensive than that required for alternative test methods, such as Test Method D4294 . Consult the Index to ASTM Standards for alternative test methods.