论文部分内容阅读
建立了顶空气相色谱-质谱检测地表水中三氯甲烷、四氯甲烷、三氯乙烯、四氯乙烯、三溴甲烷五种挥发性有机化合物残留量的方法,选择离子扫描模式(SIM)检测,方法的检出限为1.2μg/L,在10~200μg/L范围内呈现良好的线性关系,相关系数均为0.9992,在加标回收实验中,三氯甲烷、四氯甲烷、三氯乙烯、四氯乙烯、三溴甲烷的加标回收率分别为99.2%,100.1%,95.9%,99.1%,96.7%,该方法灵敏度高,分离效果良好,能有效地消除复杂基质带来的干扰,可以作为地表水中三氯甲烷、四氯甲烷、三氯乙烯、四氯乙烯、三溴甲烷残留量的检测和确证方法。
A method of headspace gas chromatography-mass spectrometry (GC-MS) for the determination of five volatile organic compounds (CH 3 CH 4 CH 4 CH 4 CH 3 CH 4 CH 3 CH 3 CH 3 CH 3) in surface water was established. The method of ion scan mode (SIM) The detection limit was 1.2μg / L, which showed a good linear relationship in the range of 10 ~ 200μg / L with the correlation coefficient of 0.9992. In the spiked recovery experiments, chloroform, tetrachloromethane, trichlorethylene and tetrakis The spiked recoveries of vinyl chloride and tribromomethane were 99.2%, 100.1%, 95.9%, 99.1% and 96.7%, respectively. The method has high sensitivity, good separation effect and can effectively eliminate the interference caused by complex matrices. Determination of chloroform, tetrachloromethane, trichlorethylene, tetrachlorethylene, tribromomethane residues in water.