1.1 本规范涵盖了被认为适合与ASTM International管辖的标准一起使用的水的所需特性。 1.2 ASTM标准的手册、形式和样式中规定了水类型和等级的字母数字字符。 2 这些是按照历史优先顺序分配的，不应被视为水纯度进展的指示。 1.3 已经指定了四种类型的水，另外三个等级可适用于这四种类型。等级规范专门针对微生物来源的污染物。 1.4 所有适用的ASTM国际标准都应参考这些试剂水类型中的一种或多种，其中需要试剂水作为分析测量过程的组成部分。1.5 尽管这些水类型和相关等级是专门针对ASTM国际标准定义的，但它们可能适用于其他应用。本规范的用户有责任确保所选的水类型或等级适合其预期用途。从历史上看，I、II、III和IV型试剂水与其生产的特定工艺有关。从2018年版本规范开始，这些类型的水可以使用替代技术生产，只要满足适当的成分规范（包括细菌和内毒素，如果适用），并且如此生产的水已被证明适用于指定使用此类水的应用。 1.6 有关这些指定水的应用、制备、使用和监测、储存、处理、分配、测试以及水净化系统验证的指南见 附录X1 本规范的。 1.7 单位- 以SI单位表示的值将被视为标准值。本标准不包括其他计量单位。 1.8 本标准并不旨在解决与其使用相关的所有安全性问题（如果有）。本标准的使用者有责任在使用前建立适当的安全、健康和环境实践并确定法规限制的适用性。 1.9 本国际标准是根据世界贸易组织技术性贸易壁垒委员会发布的《关于制定国际标准、指南和建议的原则的决定》中确立的国际公认的标准化原则制定的。

1.1 This specification covers the required characteristics of waters deemed suitable for use with the standards under the jurisdiction of ASTM International. 1.2 The alphanumeric characters ascribed to water types and grades are specified in the manual, Form and Style for ASTM Standards. 2 These have been assigned in order of historical precedence and should not be taken as an indication of a progression in water purity. 1.3 Four types of waters have been specified with three additional grades that can be applied to the four types. The grade specifications specifically address contaminants of microbiological origin. 1.4 All applicable ASTM International standards are expected to reference one or more of these reagent water types where reagent water is needed as a component of an analytical measurement process. 1.5 Although these water types and associated grades have been defined specifically for use with ASTM International standards, they may be appropriate for other applications. It is the responsibility of the users of this specification to ensure that the selected water types or grades are suitable for their intended use. Historically, reagent water Types I, II, III, and IV have been linked to specific processes for their production. Starting with the 2018 edition of this specification, these types of waters may be produced with alternate technologies as long as the appropriate constituent specifications are met (including bacteria and endotoxins, if applicable) and that water so produced has been shown to be appropriate for the application where the use of such water is specified. 1.6 Guidance for applications, the preparation, use and monitoring, storage, handling, distribution, testing of these specified waters, and validation of the water purification system is provided in Appendix X1 of this specification. 1.7 Units— The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard. 1.8 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. 1.9 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.