1.1 本试验方法包括通过原子吸收光谱法测定水和废水中的溶解锶和总可回收锶。 1.2 本试验方法适用于0.1至1 mg/L锶的范围。可通过稀释原始样品来扩大范围。 1.3 在天然和试剂水基质中获得循环数据。用户有责任确保未经测试基质水的测试方法的有效性。 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、健康和环境实践，并确定监管限制的适用性。 具体预防说明见 8.4 和 8.9 . 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 虽然大多数饮用水含有少量锶，但美国中西部的一些井水的锶含量高达39毫克/升。 3. 5.2 本试验方法提供了一种可靠的方法，可准确测定锶，并校正通过中引用的方法获得的钙结果 6.2 . 5.3 ICP-MS或ICP-AES也可能适用，但仪器成本较高。见测试方法 D1976 和 D5673 .

1.1 This test method covers the determination of dissolved and total recoverable strontium in water and wastewater by atomic absorption spectroscopy. 1.2 The test method is applicable in the range from 0.1 to 1 mg/L of strontium. The range may be extended by dilution of the original sample. 1.3 Round-robin data were obtained in natural and reagent water matrices. It is the user's responsibility to ensure the validity of the 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 conversions 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. Specific precautionary statements are given in 8.4 and 8.9 . 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 Although most potable supplies contain little strontium, some well waters in the midwestern part of the United States have levels as high as 39 mg/L. 3 5.2 This test method affords a reliable means of accurately determining strontium and correcting calcium results obtained by the methods cited in 6.2 . 5.3 ICP-MS or ICP-AES may also be appropriate but at a higher instrument cost. See Test Methods D1976 and D5673 .