1.1这些试验方法用于测定危险废液、污泥、半固体和固体的pH值。 小节 试验方法A-pH纸筛选pH值 9-14 试验方法B-通过电测量筛选pH值 15-22 1.2试验方法A使用大范围pH值纸快速指示pH值，使其在约1个pH值单位内。 1.3试验方法B使用pH计在约0.1 pH单位内进行测量。 1.4这些试验方法旨在作为初步试验，以补充可用于测定pH值的更复杂定量分析技术。这些试验方法为用户提供，在没有更先进的技术且废物总成分未知的情况下，筛选废物的酸碱度潜在危险水平的选项和能力。 1.5 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和健康实践，并确定监管限制的适用性。 第6节给出了具体的危险信息。 ====意义和用途====== 这些测试方法旨在供废物管理行业的人员使用，以通过pH值表征废物流。这些方法将识别由于高酸度或高碱度而可能要求特定废物管理程序的废物。

1.1 These test methods are used to determine the pH of a hazardous waste liquid, sludge, semisolid and solid. Sections Test Method A-pH Screening by pH Paper 9-14 Test Method B-pH Screening by Electrometric Measurement 15-22 1.2 Test Method A uses a wide-range pH paper for a rapid indication of pH to within about 1 pH unit. 1.3 Test Method B uses a pH meter to measure within about 0.1 pH unit. 1.4 These test methods are designed and intended as a preliminary test to complement the more sophisticated quantitative analytical techniques that may be used to determine pH. These test methods offer, to the user, the option and the ability to screen waste for potentially hazardous levels of acidity and alkalinity when the more sophisticated techniques are not available and the total waste composition is unknown. 1.5 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 and health practices and determine the applicability of regulatory limitations prior to use. Specific hazard information is given in Section 6. ====== Significance And Use ====== These test methods are intended for use by those in the waste management industries to characterize waste streams by pH. These methods will identify those waste materials that may dictate a specific waste management procedure due to high acidity or alkalinity.