1.1 本规程描述了使用硝酸、氢氟酸、盐酸和硼酸对典型工业炉进料流材料进行多级微波消解，以便随后测定痕量金属。 1.2 本规程已成功用于煤、焦炭、水泥原料和主要由废油漆相关材料组成的废物衍生燃料样品，以准备测量以下微量元素:Ag、As、Ba、Be、Cd、Cr、Hg、Pb、Sb和Tl。本规程可能适用于以上未列出的元素。 1.3 这种做法也适用于其他废料（例如，飞灰、铸造砂、明矾加工残渣、水泥窑粉尘等）。 1.4 以国际单位表示的数值视为标准值。本标准括号内的其他计量单位仅供参考。 1.5 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。 具体危险说明见第节 8. . 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 美国环境保护局法规40 CFR 266要求锅炉、水泥窑和其他利用废物的工业炉- 衍生燃料在评估潜在金属排放时遵循特定的指南。估算潜在排放量的常见方法是对所有进料流材料进行总金属分析。本规程描述了一种多级微波辅助消解程序，用于溶解微量元素进行光谱分析。

1.1 This practice describes the multi-stage microwave digestion of typical industrial furnace feed stream materials using nitric, hydrofluoric, hydrochloric, and boric acids for the subsequent determination of trace metals. 1.2 This practice has been used successfully on samples of coal, coke, cement raw feed materials, and waste-derived fuels composed primarily of waste paint-related material in preparation for measuring the following trace elements: Ag, As, Ba, Be, Cd, Cr, Hg, Pb, Sb, and Tl. This practice may be applicable to elements not listed above. 1.3 This practice is also effective for other waste materials (for example, fly ash, foundry sand, alum process residue, cement kiln dust, etc.). 1.4 The values stated in SI units are to be regarded as standard. Other units of measurement in parentheses in this standard are informational. 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. Specific hazard statements are given in Section 8 . 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 The U.S. Environmental Protection Agency Regulations, 40 CFR 266, require that boilers, cement kilns, and other industrial furnaces utilizing waste-derived fuel adhere to specific guidelines in assessing potential metals emissions. A common approach for estimating potential emissions is performing total metals analysis on all feed stream materials. This practice describes a multi-stage microwave-assisted digestion procedure that solubilizes trace elements for spectroscopic analyses.