1.1 本试验方法包括通过原子吸收光谱法测定大多数水、废水和卤水中的溶解钼和总可回收钼。 2. 1.2 本试验方法适用于1至25μg/L钼。可通过稀释样品来扩大范围。 1.3 该试验方法已成功用于天然水和试剂水。用户有责任确保本试验方法对未经试验基质的水的有效性。 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和健康实践，并确定监管限制的适用性。 有关具体预防说明，请参阅 8.16 和 11.12 . 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 钼可以在化学清洗金属合金部件后产生的废物中找到。 5.2 国家排污消除系统（NPDES）许可证或其他标准，或两者都要求监测排放到可通航水域的污水中的污染物，以及以可能导致地下水最终污染的方式处理的污水中的污染物。 5.3 本试验方法提供了一种准确、灵敏的方法来确定是否符合这些许可证。 5.4 ICP-MS或ICP-AES也可能适用，但仪器成本较高。见测试方法 D5673 和 D1976 .

1.1 This test method covers the determination of dissolved and total recoverable molybdenum in most waters, wastewaters, and brines by atomic absorption spectroscopy. 2 1.2 This test method is applicable in the range from 1 to 25 μg/L of molybdenum. The range may be extended by dilution of the sample. 1.3 This test method has been used successfully with natural and reagent waters. It is the user's responsibility to ensure the validity of this test method for waters of untested matrices. 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 and health practices and determine the applicability of regulatory limitations prior to use. For specific precautionary statements, see 8.16 and 11.12 . 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 Molybdenum can be found in waste that results from chemical cleaning of components in which the metal is alloyed. 5.2 National Pollution Discharge Elimination System (NPDES) permits or other standards, or both, require monitoring pollutants in waste discharged onto the water shed of, or into, navigable waters, and those disposed of in such a manner that eventual contamination of underground water could result. 5.3 This test method affords an accurate and sensitive means of determining compliance with those permits. 5.4 ICP-MS or ICP-AES may also be appropriate but at a higher instrument cost. See Test Methods D5673 and D1976 .