1.1 这些试验方法涵盖了水中锌的测定。部分 26 质量控制与这些试验方法有关。两种试验方法如下: 试验方法 浓度范围 小节 A-原子吸收，直接 0.05至2毫克/升 8 – 16 B-原子吸收， 螯合萃取 20至200微克/升 17 – 25 1.2 可测定溶解锌或总可回收锌。 1.3 这些测试方法已成功用于试剂级水。关于对其他矩阵的适用性，请参阅具体的测试方法。用户有责任确保这些测试方法在其他矩阵中的有效性。 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的数学转换- 磅单位仅供参考，不被视为标准单位。 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，并确定监管限制的适用性。 有关具体的危险说明，请参阅第节 6. 和 12.7.1 , 21.7 , 23.10 . 1.6 停止使用以前的两种比色试验方法。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====== 4.1 锌是身体生长中必不可少的有益元素。在碱性水中，浓度超过5毫克/升会导致苦涩的味道和乳白色。美国饮用水的锌浓度在0.06和7.0 mg/L之间变化，平均值为1.33 mg/L。锌通常因镀锌铁变质和黄铜脱锌而进入家庭供水。水中的锌也可能来自工业水污染。 3. 4.2 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 These test methods cover the determination of zinc in water. Section 26 on Quality Control pertains to these test methods. Two test methods are given as follows: Test Method Concentration Range Sections A—Atomic Absorption, Direct 0.05 to 2 mg/L 8 – 16 B—Atomic Absorption, Chelation-Extraction 20 to 200 μg/L 17 – 25 1.2 Either dissolved or total recoverable zinc may be determined. 1.3 These test methods have been used successfully with reagent grade water. See the specific test method for applicability to other matrices. It is the user's responsibility to assure the validity of these test methods in other 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 hazard statements, see Section 6 and 12.7.1 , 21.7 , 23.10 . 1.6 Two former colorimetric test methods were 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 ====== 4.1 Zinc is an essential and beneficial element in body growth. Concentrations above 5 mg/L can cause a bitter astringent taste and opalescence in alkaline waters. The zinc concentration of U.S. drinking waters varies between 0.06 and 7.0 mg/L with a mean of 1.33 mg/L. Zinc most commonly enters the domestic water supply from deterioration of galvanized iron and dezincification of brass. Zinc in water also may result from industrial water pollution. 3 4.2 ICP-MS or ICP-AES may also be appropriate but at a higher instrument cost. See Test Methods D5673 and D1976 .