超声一紫外法测定土壤中石油类物质含量  

DETERMINATION OF OIL CONTENT IN SOIL BY ULTRAVIOLETVISIBLE SPECTROPHOTOMETRIC METOD AND SUPERSONIC EXTRACTION

作　　者：李纪云[1] 李丽[1] 冯成武[1] 

机构地区：[1]石油大学炼制系,山东东营257062

出　　处：《石油大学学报（自然科学版）》1999年第6期82-83,93,共3页Journal of the University of Petroleum,China(Edition of Natural Science)

基　　金：中国石油天然气集团公司重点科学技术项目

摘　　要：以三氯甲烷作为提取剂抽提土壤中的石油类物质时，最佳超声提取条件是：超声波功率为２５Ｗ，室温下超声提取１５ｍｉｎ，每个样品提取２次，每次加入提取剂２０ｍＬ。将提取物中的溶剂蒸发后，用石油醚溶解残余物，再用紫外分光光度法进行测定。该方法的线性范围宽，精密度和准确度好，相对标准偏差为１８０％，加标回收率为９５３％，最低检出限为０．００３ｍｇ／ｇ。A method for determining oil content in soil by ultraviolet-visible spectrophotometer and supersonic extraction is presented. The trichloromethane is used as an extraction solvent. The supersonic extraction conditions for oil are optimized. The supersonic power is 25 W, and supersonic extraction time is 15 minutes at 23 . One sample is extracted for 2 times, and 20 mL extraction solvent may be used every time. The extraction solvent is evaporated at 65 5 , then the remnant is dissolved by petroleum ether. Ultraviolet-visible spectrophotometer is used to determine oil content in 225 nm wave length. The linearity of the developed method is verified. The relative standard deviation of the method is 1.80%, and the average recovery rate is 95.3%. The detection limit is 0.003 mg/ g.

关 键 词：土壤 石油污染 超声抽提 紫外分光光度法 测定 

分 类 号：X833.02[环境科学与工程—环境工程]