1.1 本指南描述了用于测定大气湿沉降（AWD）中阴离子和阳离子的质量保证（QA）协议，如所示 表1 . 1.2 本指南包括校准标准制备的最低建议要求和验证实验室测量结果的建议程序。 1.3 本指南描述了质量保证样品分析频率的最低要求，并推荐了质量保证数据评估程序。 1.4 本指南的建议基于AWD中预期的阴离子和阳离子浓度 ( 1. ) 2. 和 附录X1 . 1.5 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。 1.6 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。 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。

1.1 This guide describes quality assurance (QA) protocols for the determination of the anions and cations in Atmospheric Wet Deposition (AWD) shown in Table 1 . 1.2 Included in this guide are minimum recommended requirements for the preparation of calibration standards and suggested procedures for validating laboratory measurement results. 1.3 This guide describes minimum requirements for the frequency of analysis of quality assurance samples and recommends procedures for the evaluation of quality assurance data. 1.4 The guide's recommendations are based upon expected anion and cation concentrations in AWD ( 1 ) 2 and Appendix X1 . 1.5 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard. 1.6 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. 1.7 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.