1.1 本试验方法主要用于测定高甲烷含量气体燃料（如天然气）中的特殊挥发性含硫化合物。它已成功应用于其他类型的气体样品，包括空气、消化器、垃圾填埋场和炼油厂燃料气。硫化合物的检测范围（报告为皮克硫）为0.01至1000。这相当于0.01至1000 mg/m 3. ，基于1 cc样本的分析。 1.2 通过稀释或选择较小的样品回路，可以将本试验方法的范围扩大到更高的浓度。 注1: 稀释会降低方法精度。 1.3 本试验方法无意识别样品中的所有硫物种。仅测定在所选色谱条件下通过所选色谱柱洗脱的化合物。对于范围内的所有含硫化合物，探测器对硫的响应为等摩尔( 1.1 )本试验方法。因此，未识别化合物的测定精度与已识别物质的测定精度相同。总硫含量由单独定量成分的总和确定。 1.4 单位- 以国际单位制表示的数值应视为标准值。国际单位制后括号中给出的值仅供参考，不被视为标准值。 1.5 本标准并非旨在解决与其使用相关的所有安全问题（如有）。本标准的用户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。 1.6 本国际标准是根据世界贸易组织技术性贸易壁垒（TBT）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》中确立的国际公认标准化原则制定的。 ====意义和用途====== 5.1 许多天然气和石油气的来源都含有含硫化合物，这些化合物对气体燃料处理中使用的催化剂有气味、腐蚀性和毒性。 5.2 出于安全目的，向天然气和液化石油气中添加低ppm量的硫加臭剂。一些加臭剂不稳定，会发生反应形成气味阈值较低的化合物。对这些加臭气体进行定量分析，确保加臭剂注入设备的性能符合规范。 5.3 虽然本试验方法不适用于天然气和相关燃料以外的气体，但已成功应用于燃料型气体，包括炼油厂、垃圾填埋场、热电联产和污水沼气。 炼油厂、垃圾填埋场、污水消化池和其他相关的燃料型气体固有地含有易挥发的含硫化合物，受联邦、州或地方控制。这些燃料型气体的甲烷部分偶尔出售给天然气经销商。由于这些原因，监管机构以及生产和分销设施都可能需要准确测定硫，以满足监管、生产或分销要求。燃料气也用于能源生产，或使用因原料气中硫含量过高而中毒的催化剂转化为新产品。 工业界经常需要测量这些燃料型气体中的硫，以保护其催化剂投资。 5.4 分析方法- 气相色谱法（GC）通常用于测定天然气的固定气体和有机成分（试验方法 D1945 ). 用于分析燃料气体中硫的其他标准ASTM方法包括试验方法 D1072号 和 D4468 总硫和试验方法 D4010年 和 D4884 对于硫化氢。

1.1 This test method is primarily for the determination of speciated volatile sulfur-containing compounds in high methane content gaseous fuels such as natural gas. It has been successfully applied to other types of gaseous samples, including air, digester, landfill, and refinery fuel gas. The detection range for sulfur compounds, reported as picograms sulfur, is 0.01 to 1000. This is equivalent to 0.01 to 1000 mg/m 3 , based upon the analysis of a 1 cc sample. 1.2 The range of this test method may be extended to higher concentration by dilution or by selection of a smaller sample loop. Note 1: Dilution will reduce method precision. 1.3 This test method does not purport to identify all sulfur species in a sample. Only compounds that are eluted through the selected column under the chromatographic conditions chosen are determined. The detector response to sulfur is equimolar for all sulfur compounds within the scope ( 1.1 ) of this test method. Thus, unidentified compounds are determined with equal precision to that of identified substances. Total sulfur content is determined from the total of individually quantified components. 1.4 Units— The values stated in SI units are to be regarded as standard. The values given in parentheses after SI units are provided for information only and are not considered standard. 1.5 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. 1.6 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 Many sources of natural and petroleum gases contain sulfur compounds that are odorous, corrosive, and poisonous to catalysts used in gaseous fuel processing. 5.2 Low ppm amounts of sulfur odorants are added to natural gas and LP gases for safety purposes. Some odorants are unstable and react to form compounds having lower odor thresholds. Quantitative analysis of these odorized gases ensures that odorant injection equipment is performing to specification. 5.3 Although not intended for application to gases other than natural gas and related fuels, this test method has been successfully applied to fuel type gases, including refinery, landfill, cogeneration, and sewage digester gas. Refinery, landfill, sewage digester, and other related fuel type gases inherently contain volatile sulfur compounds that are subject to federal, state, or local control. The methane fraction of these fuel type gases is occasionally sold to distributors of natural gas. For these reasons, both regulatory agencies and production and distribution facilities may require the accurate determination of sulfur to satisfy regulatory, production, or distribution requirements. Fuel gases are also used in energy production or are converted to new products using catalysts that are poisoned by excessive sulfur in the feed gas. Industry frequently requires measurement of sulfur in these fuel type gases to protect their catalyst investments. 5.4 Analytical Methods— Gas chromatography (GC) is commonly used in the determination of fixed gas and organic composition of natural gas (Test Method D1945 ). Other standard ASTM methods for the analysis of sulfur in fuel gases include Test Methods D1072 and D4468 for total sulfur and Test Methods D4010 and D4884 for hydrogen sulfide.