1.1 本规程涵盖了使用密闭容器微波加热技术对水中总金属进行定量样品消解的一般注意事项。本规程适用于表面废水、含盐废水、生活废水和工业废水。 1.2 由于令人满意的仪器的不同品牌和型号之间存在差异，因此无法提供详细的操作说明。相反，分析员应遵循特定仪器制造商提供的说明。 1.3 如果用户根据本消解规程确定精度和偏差，则本规程可与以下ASTM标准一起使用: 试验方法 D857 ，试验方法 D858 ，试验方法 D1068号 ，试验方法 D1687 ，试验方法 D1688 ，试验方法 D1691 ，试验方法 D1886 ，试验方法 D1976 ，实践 D3370 ，试验方法 D3557 ，试验方法 D3559 实践 D3919 ，试验方法 D4190 实践 D4453 实践 D4691 ，以及试验方法 D5673 . 1.4 以国际单位制表示的数值应视为标准值。括号中给出的值是英寸-磅单位的数学转换，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。 有关具体的危险说明，请参阅第节 9 . 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 使用火焰原子吸收分光光度法、电感耦合等离子体发射分光光度法、直流等离子体发射分光光度法或石墨炉原子吸收分光光度法分析多种类型的金属水时，需要使用消解实践，以确保从样品基质中正确统计回收金属。使用密闭容器微波技术将加快从水基质中完全回收金属，并消除外部来源的样品污染。

1.1 This practice covers the general considerations for quantitative sample digestion for total metals in water using closed vessel microwave heating technique. This practice is applicable to surface, saline, domestic, and industrial wastewater. 1.2 Because of the differences among various makes and models of satisfactory instruments, no detailed operating instructions can be provided. Instead, the analyst should follow the instructions provided by the manufacturer of the particular instrument. 1.3 This practice can be used with the following ASTM standards, providing the user determines precision and bias based on this digestion practice: Test Method D857 , Test Methods D858 , Test Methods D1068 , Test Methods D1687 , Test Methods D1688 , Test Methods D1691 , Test Methods D1886 , Test Method D1976 , Practices D3370 , Test Methods D3557 , Test Methods D3559 , Practice D3919 , Test Method D4190 , Practice D4453 , Practice D4691 , and Test Method D5673 . 1.4 The values stated in SI units are to be regarded as standard. The values given in parentheses are mathematical conversion to inch-pound units that 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. For specific hazard statements, see Section 9 . 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 analysis of many types of water for metals using flame atomic absorption spectrophotometry, inductively coupled plasma emission spectrophotometry, direct current plasma emission spectrophotometry, or graphite furnace atomic absorption spectrophotometry necessitates the use of a digestion practice in order to ensure the proper statistical recovery of the metals from the sample matrix. The use of closed vessel microwave techniques will speed the complete recovery of metals from the water matrices and eliminate sample contamination from external sources.