胶束电动毛细管色谱法测定海洋沉积物中的苯、甲苯和二甲苯  

Determination of Benzene,Toluene and Xylene in Marine Sediment Samples by Micellar Electrokinetic Capillary Chromatography

作　　者：王树虎[1] 史向阳[1] 马万云[1] 陈瓞延[1] 刘季昂[2] 

机构地区：[1]清华大学现代应用物理系,北京100084 [2]中国科学院生态环境研究中心,北京100085

出　　处：《色谱》2000年第1期77-79,共3页Chinese Journal of Chromatography

基　　金：国家海洋863资助!项目 (863 82 0 0 3 探 1)

摘　　要：建立了用胶束电动毛细管色谱法(MECC)对海洋沉积物中的苯、甲苯和二甲苯进行分析测定的方法。用45cm(到检测窗口40cm)×75μmi.d.毛细管柱,以75mmolLSDS2mmolL四硼酸钠溶液(外加体积分数为20%的甲醇)为缓冲液(pH9.16)。当电压为25kV、检测波长为200nm时,苯、甲苯和二甲苯在20min内得到了良好的分离。用峰面积定量,线性范围为4～50mgL,相对标准偏差在6.2%以内。测得海洋沉积物中的这些苯系物的质量比范围为3.79～17.36μgg。The analysis and determination of the contents of benzene series compounds in marine sediment are important in chemical exploration of petroleum resources. In the present study a method has been developed for this purpose by using micellar electrokinetic capillary chromatography (MECC). A fused silica capillary of 45 cm×75 μm i.d. (effective length 40 cm) was used. Running buffer was 2 mmol/L aqueous solution of sodium tetraborate containing 75 mmol/L sodium dodecyl sulfate (pH 9.16) and 20% methanol. The applied voltage was 25 kV and detection wavelength was 200 nm. The benzene, toluene and xylene were separated well within 20 min. Peak area was used for quantitative analysis. The calibration curves were linear in the range 4 50 mg/L. The relative standard deviation was within 6.2%. The contents of benzene series in sediments were between 3.79 and 17.36 μg/g.

关 键 词：毛细管色谱法 海洋沉积物 苯系化合物 

分 类 号：O625.11[理学—有机化学] P736.41[理学—化学]