1.1 本试验方法描述了洗涤剂中氮三乙酸（NTA）的测定。 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和健康实践，并确定监管限制的适用性。 有关具体的安全预防措施，请参阅 6.5 . ====意义和用途====== 3.1 该测试方法适用于研究、开发和制造控制，以监测粉末和液体洗涤剂中的NTA（一种螯合剂）水平。 3.2 准确测定螯合剂对于评估洗涤剂产品的成本和性能非常重要。

1.1 This test method describes the determination of nitrilotriacetates (NTA) in detergents. 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 and health practices and determine the applicability of regulatory limitations prior to use. For specific safety precautions, see 6.5 . ====== Significance And Use ====== 3.1 This test method is suitable in research, development, and manufacturing control to monitor the level of NTA, a sequestering agent, in powder and liquid detergents. 3.2 Accurate determination of a sequestering agent is important in evaluating cost and performance of detergent products.