1.1 本试验方法包括通过石墨炉原子吸收分光光度法测定大多数水和废水中的溶解钒和总可回收钒。 1.2 该测试方法的最佳范围为10至200μg/L钒（基于20μL样本量）。高于200μg/L的浓度可通过适当稀释样品来确定。据报道，钒的检测水平低至4μg/L。 1.3 该测试方法已成功用于试剂水、湖水、自来水、河水、中等Btu煤气化过程的冷凝水和井水。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。本标准不包括其他计量单位。 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，并确定适用性或监管限制。 1.6 以前的试验方法A（催化）已停止。提到 附录X1 以获取历史信息。 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 钒存在于对金属合金成分进行化学清洗后产生的废物中。 5.2 国家污染物排放消除系统许可证或其他标准，或两者都要求监测排放到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染物。 5.3 本试验方法提供了一种准确、灵敏的方法来确定这些许可证的符合性或不符合性，或两者兼有。 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 vanadium in most waters and wastewater by graphite furnace atomic absorption spectrophotometry. 1.2 The optimum range of this test method is 10 to 200 μg/L of vanadium based on a 20-μL sample size. Concentrations higher than 200 μg/L may be determined by proper dilution of sample. A detection level as low as 4 μg/L of vanadium has been reported. 1.3 This test method has been used successfully with reagent water, lake water, tap water, river water, condensate from a medium Btu coal gasification process, and well water. 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. No other units of measurement are included in this 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 or regulatory limitations prior to use. 1.6 Former Test Method A (Catalytic) was discontinued. Refer to Appendix X1 for historical information. 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 Vanadium can be found in waste that result from chemical cleaning of components in which the metal is alloyed. 5.2 National Pollutant Discharge Elimination Systems 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 or noncompliance, or both, 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 .