1.1 这些测试方法包括确定佐剂是否符合酸化剂、碱性混合物、碱度剂或缓冲液的术语定义 E1519 . 1.2 以国际单位制或英寸-磅单位表示的数值应单独视为标准值。每个系统中规定的值可能不是精确的等效值；因此，每个系统应相互独立使用。将两个系统的值合并可能会导致不符合标准。 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====== 4.1 本试验方法适用于作为罐式混合佐剂销售的产品，用于农产品。 4.2 A部分确定了被测佐剂的pH值改性特性是否符合酸化剂、碱度剂或基本混合物的术语定义 E1519 . B部分提供了佐剂缓冲容量的测量。这可用于估计将喷雾溶液保持在所需pH值所需的缓冲液量。 4.3 可以使用其他pH标准（见试验方法 E70 )只要测得的pH值不在所用标准范围之外。 4.4 如果特定应用中使用的材料样品可用，则可以使用第一种方法确定获得所需pH值所需的佐剂速率。佐剂调整特定系统pH值的能力将取决于添加前的初始pH值。 4.5 第二种方法可用于确定将一定量喷雾溶液的pH值更改为所需值所需的佐剂量（参见 注1 ). 注1: 许多酸化剂和碱性混合物也是缓冲液，因此pH值变化不能提供有效的缓冲容量测量。

1.1 These test methods cover determining if an adjuvant meets the definitions of an acidifier, a basic blend, alkalinity agent, or buffer in Terminology E1519 . 1.2 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in non-conformance with the 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 ====== 4.1 This test method is intended for products sold as tank mix adjuvants for use with agricultural products. 4.2 Part A provides a determination of whether the pH modification characteristics of the adjuvant tested meet the definition of an acidifier, alkalinity agent, or a basic blend in Terminology E1519 . Part B provides a measure of the buffer capacity of the adjuvant. This can be used to estimate the amount of a buffer that will be required to keep a spray solution at the desired pH. 4.3 Other pH standards can be used (see Test Method E70 ) as long as the pHs measured are not outside the range of the standards used. 4.4 If samples of the material to be used in a particular application are available, the first method can be used to determine what adjuvant rate is required to obtain the desired pH. The ability of an adjuvant to adjust the pH of a particular system will depend on the initial pH before addition. 4.5 The second method can be used to determine the amount of an adjuvant required to change the pH of a quantity of spray solution to the required value (see Note 1 ). Note 1: Many acidifiers and basic blends also are buffers, so the pH change does not provide a useful measure of buffer capacity.