1.1 本规程提出了清洁用于收集大气湿沉降（AWD）的塑料或玻璃材料的建议。本规程还提出了保存用于化学分析的样品的建议。 1.2 用于收集AWD以分析其无机成分和微量元素的材料应为塑料。高密度聚乙烯（HDPE）使用最广泛，适用于大多数样品，包括用于测定乙酸、柠檬酸和甲酸阴离子的样品。硼硅酸盐玻璃是测定乙酸、柠檬酸和甲酸中阴离子的收集替代品；建议用于测定其他有机化合物的样品。 1.3 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。 1.4 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。 1.5 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 AWD的某些化学成分不稳定，必须在化学分析之前保存。如果不保存样品，分析物可能会通过分解或吸附到储存瓶中而丢失。 4.2 AWD样品的污染可能发生在样品保存和样品储存期间。需要正确选择和清洁采样容器，以减少AWD样本污染的可能性。 4.3 以下程序中使用的天然海绵和无滑石塑料手套应被视为潜在污染源。应根据个人经验选择尽量减少污染的产品。

1.1 This practice presents recommendations for the cleaning of plastic or glass materials used for collection of atmospheric wet deposition (AWD). This practice also presents recommendations for the preservation of samples collected for chemical analysis. 1.2 The materials used to collect AWD for the analysis of its inorganic constituents and trace elements should be plastic. High density polyethylene (HDPE) is most widely used and is acceptable for most samples including samples for the determination of the anions of acetic, citric, and formic acids. Borosilicate glass is a collection alternative for the determination of the anions from acetic, citric, and formic acid; it is recommended for samples for the determination of other organic compounds. 1.3 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard. 1.4 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. 1.5 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 Some chemical constituents of AWD are not stable and must be preserved before chemical analysis. Without sample preservation, it is possible that analytes can be lost through decomposition or sorption to the storage bottles. 4.2 Contamination of AWD samples can occur during both sample preservation and sample storage. Proper selection and cleaning of sampling containers are required to reduce the possibility of contamination of AWD samples. 4.3 The natural sponge and talc-free plastic gloves used in the following procedures should be recognized as potential sources of contamination. Individual experience should be used to select products that minimize contamination.