1.1 本规程涵盖了使用密闭容器微波加热从土壤和沉积物中溶剂萃取总石油烃（TPH），以便随后通过重量分析或气相色谱技术进行测定。 1.2 建议仅适用于可通过十目筛网（约2 mm开口）的固体样品。 1.3 通过本规程获得的溶剂提取物可用于分析总的或特定的非挥发性和半挥发性石油烃，但可能需要在特定化合物分析之前进行样品清理程序。 1.4 本规程仅限于推荐用于微波溶剂萃取系统的溶剂。 1.5 以国际单位制表示的数值应视为标准值。 1.5.1 例外情况- 压力单位的英寸-磅值应视为标准值；括号中显示了国际单位转换。 1.6 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。 第节给出了具体的危险说明 9 . ====意义和用途====== 5.1 土壤和沉积物的溶剂萃取可以提供有关石油碳氢化合物浸出可用性、水质变化或其他现场条件的信息。 5.2 快速加热，再加上温度超过丙酮/己烷的常压沸点，可以减少样品制备或提取时间。 5.3 需要减少溶剂量，并通过使用封闭的萃取容器消除因沸腾和蒸发造成的溶剂损失。

1.1 This practice covers the solvent extraction of total petroleum hydrocarbon (TPH) from soils and sediments, using closed vessel microwave heating, for subsequent determination by gravimetric or gas chromatographic techniques. 1.2 This practice is recommended only for solid samples that can pass through a ten mesh screen (approximately 2 mm openings). 1.3 The solvent extract obtained by this practice may be analyzed for total or specific nonvolatile and semivolatile petroleum hydrocarbons but may require sample clean-up procedures prior to specific compound analysis. 1.4 This practice is limited to solvents that are recommended for use in microwave solvent extraction systems. 1.5 The values stated in SI units are to be regarded as standard. 1.5.1 Exception— The inch-pound values given for units of pressure are to be regarded as standard; SI unit conversions are shown in parentheses. 1.6 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 statements are given in Section 9 . ====== Significance And Use ====== 5.1 Solvent extraction of soils and sediments can provide information on the availability of petroleum hydrocarbons to leaching, water quality changes, or other site conditions. 5.2 Rapid heating, in combination with temperatures in excess of the atmospheric boiling point of acetone/hexane, reduces sample preparation or extraction times. 5.3 Reduced amounts of solvents are required and solvent loss due to boiling and evaporation are eliminated by use of closed extraction vessels.