1.1 本程序包括在土壤中测定甲基膦酸二异丙酯（DIMP）、甲基膦酸乙酯（EMPA）、甲基膦酸异丙酯（IMPA）、甲基膦酸（MPA）和频哪醇甲基膦酸（PMPA），在本试验方法中统称为有机膦酸盐（OPs）。该方法基于通过加压流体萃取（PFE）对土壤进行溶剂萃取。通过液相色谱/串联质谱（LC/MS/MS）对提取物进行过滤和分析。OPs通过该方法定性和定量测定。 1.2 单位- 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 方法检测限 2. （MDL）、电喷雾电离（ESI）模式和报告范围 3. 有关老年退休金的详细信息，请参见 表1 . 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====== 5.1 这是一种基于性能的方法，允许进行修改以提高性能。 5.1.1 由于新型仪器和色谱柱化学的快速发展，只要性能数据更好或相当，就允许对本标准中描述的分析进行更改。应记录任何修改，并生成性能数据。本标准生成的数据的用户应了解这些变化，并提供性能数据，证明其具有更好或同等的性能。 5.2 有机磷农药通过破坏调节神经递质乙酰胆碱的酶而影响神经系统。它们是在19世纪早期发展起来的，但它们对昆虫的影响与对人类的影响相似，是在1932年发现的。 有些有毒，曾被用作化学武器制剂。有机磷农药通常不会在环境中持久存在。 7. , 8. 5.3 本试验方法用于分析选定的有机磷农药降解产物。 5.4 该方法已用于各种土壤。

1.1 This procedure covers the determination of Diisopropyl Methylphosphonate (DIMP), Ethyl Methylphosphonic Acid (EMPA), Isopropyl Methylphosphonic Acid (IMPA), Methylphosphonic Acid (MPA), and Pinacolyl Methylphosphonic Acid (PMPA), referred to collectively as organophosphonates (OPs) in this test method, in soil. This method is based upon solvent extraction of a soil by pressurized fluid extraction (PFE). The extract is filtered and analyzed by liquid chromatography/tandem mass spectrometry (LC/MS/MS). OPs are qualitatively and quantitatively determined by this method. 1.2 Units— The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard. 1.3 The method detection limit 2 (MDL), electrospray ionization (ESI) mode, and reporting range 3 for the OPs are listed in Table 1 . 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 ====== 5.1 This is a performance-based method, and modifications are allowed to improve performance. 5.1.1 Due to the rapid development of newer instrumentation and column chemistries, changes to the analysis described in this standard are allowed as long as better or equivalent performance data result. Any modifications shall be documented and performance data generated. The user of the data generated by this standard shall be made aware of these changes and given the performance data demonstrating better or equivalent performance. 5.2 Organophosphate pesticides affect the nervous system by disrupting the enzyme that regulates acetylcholine, a neurotransmitter. They were developed during the early 19th century, but their effects on insects, which were similar to their effects on humans, were discovered in 1932. Some are poisonous and were used as chemical weapon agents. Organophosphate pesticides are usually not persistent in the environment. 7 , 8 5.3 This test method is for the analysis of selected organophosphorous based pesticide degradation products. 5.4 This method has been investigated for use with various soils.