1.1 本试验方法模拟将农药乳油乳液（EC）应用于有机质含量高的土壤（玉米芯颗粒）和无机质含量高的土壤（粘土颗粒），并测定颗粒在暴露于40℃之前和之后保留在大气中的溶剂量 ºC，在通风烘箱中。颗粒模拟土壤成分的两个极端，40 ºC暴露模拟高温风化。除玉米芯外，有机基质的溶剂损失也可通过重复40 °C暴露试验，所选基质替代玉米芯。然而，玉米芯的结果是必须与替代基质结果一起报告的参考。 风化前后颗粒溶剂含量的差异表明，在使用喷雾和滴灌等常用做法施用农药期间，受乳剂或溶液影响的土壤中溶剂的排放。通过高压液相色谱法（HPLC）、气相色谱法（GC）或其他经测试和证明准确且可重复的方法分析颗粒的溶剂含量。 注1: 由于该测试方法评估了土壤表面吸附，因此会低估土壤表面以下施用农药的土壤吸附。地下表面处理可能包括但不限于机械土壤注入和土壤合并应用。在这些情况下，接头深度增加- 土壤处理减少了土壤表面暴露，促进了土壤吸附水平的提高。 1.2 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。 1.3 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。 1.4 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 本试验方法专为农药乳油乳液设计。 5.2 本试验方法提供了受农药EC乳液应用影响的模拟有机土壤和无机土壤对溶剂的吸收/吸附信息。 5.3 40℃时挥发损失的溶剂量 通过该方法确定的°C是对大气中溶剂可用性的间接测量，溶剂可能与氮氧化物反应形成对流层臭氧，这是一种主要的空气污染物。

1.1 This test method simulates the application of an emulsion of a pesticide emulsifiable concentrate (EC) to soil with high organic matter (corn cob granules) and to soil with high inorganic matter (clay granules) and determines the amount of solvent retained by the granules, and withheld from the atmosphere, before and after exposure to 40 ºC in a vented oven. The granules simulate two extremes of soil composition, and the 40 ºC exposure simulates high temperature weathering. Solvent loss from organic substrates other than corn cob may also be determined by repeating the 40 °C exposure tests with the chosen substrate replacing corn cob. The results with corn cob, however, are a reference that must be reported with the alternate substrate results. The difference in solvent content of the granules before and after weathering is an indication of the emission of the solvent from soil impacted by emulsions or solutions during pesticide applications using common practices such as spraying and drip irrigating. Analysis of the granules for solvent content is by high pressure liquid chromatography (HPLC), gas chromatography (GC), or other methods tested and proven to be accurate and reproducible. Note 1: Since it evaluates soil surface sorption, this test method will underestimate soil sorption from pesticide applications made below the soil surface. Sub-soil surface treatments may include, but are not limited to, mechanical soil injection and soil incorporation applications. In these cases, the increased depth of the sub-soil treatments reduce the soil surface exposure and facilitate increased levels of soil sorption. 1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard. 1.3 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. 1.4 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 This test method is designed specifically for emulsions of pesticide emulsifiable concentrates. 5.2 This test method provides information on the absorption/adsorption of solvents by simulated organic soil and inorganic soil impacted by pesticide EC emulsion applications. 5.3 The amount of solvent lost by volatilization at 40 °C as determined by this method is an indirect measure of the atmospheric availability of the solvent to potentially react with nitrogen oxides to form tropospheric ozone, a major air pollutant.