1.1 本试验方法包括通过电感耦合等离子体原子发射光谱法分析生石油焦和煅烧石油焦试样中常见的微量金属。 1.2 本试验方法适用的元件列于 表1 。金属的检测限、灵敏度和最佳范围将随光谱仪的基体和型号而变化。 1.3 本试验方法仅适用于灰分质量百分比小于1的样品。 1.4 浓度高于工作范围上限的元素可通过额外的适当稀释进行测定。 1.5 以国际单位表示的数值应视为标准值。括号中给出的值仅供参考。 1.6 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。 1.7 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 石油焦中各种金属元素的存在和浓度是决定石油焦是否适合各种最终用途的主要因素。本试验方法提供了一种测定焦炭样品中这些金属元素浓度的方法。 5.2 该试验方法提供了一个标准程序，供买方和卖方在石油焦的商业转让中使用，以确定石油焦是否符合买方的规范。

1.1 This test method covers the analysis for commonly determined trace metals in test specimens of raw and calcined petroleum coke by inductively coupled plasma atomic emission spectroscopy. 1.2 Elements for which this test method is applicable are listed in Table 1 . Detection limits, sensitivity, and optimum ranges of the metals will vary with the matrices and model of spectrometer. 1.3 This test method is applicable only to samples containing less than one mass % ash. 1.4 Elements present at concentrations above the upper limit of the working ranges can be determined with additional, appropriate dilutions. 1.5 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only. 1.6 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. 1.7 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 The presence and concentration of various metallic elements in a petroleum coke are major factors in determining the suitability of the coke for various end uses. This test method provides a means of determining the concentrations of these metallic elements in a coke sample. 5.2 The test method provides a standard procedure for use by buyer and seller in the commercial transfer of petroleum coke to determine whether the petroleum coke meets the specifications of the purchasing party.