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[目的]调查上海市金山第二工业区河流中挥发性有机物污染情况。[方法]于2011年选取金山第二工业区河流的上、中、下段,布置3个采样断面,每个断面采集2份水样,采用吹扫捕集-气相色谱质谱联用仪进行丰水期和枯水期的13种挥发性有机物监测。[结果]方法的精密度和准确度均符合调查方案的要求,回收率为90.4%~108.2%,不同组分的相对标准偏差为0.52%~8.27%。在13种挥发性有机物中,枯水期与丰水期均检出二氯甲烷、1,1,1-三氯乙烷、苯、1,2-二氯乙烷、甲苯、氯苯、乙苯、二甲苯、1,4-二氯苯、1,2-二氯苯,根据《地表水环境质量标准》评价水体质量,检出的挥发性有机物均未超标。[结论]本次调查的地表水检出多种挥发性有机物,其中1,2-二氯乙烷浓度最高,应加强企业1,2-二氯乙烷的排放管理,防止水体质量进一步恶化。
[Objective] The research aimed to investigate the pollution of volatile organic compounds in rivers in Jinshan No.2 Industrial Park in Shanghai. [Method] In the upper, middle and lower sections of the river in the second industrial zone of Jinshan in 2011, three sampling sections were arranged, and two water samples were taken in each section, and the water samples were collected by using the purge and trap - gas chromatography-mass spectrometry Thirteen volatile organic compounds were monitored during and during dry season. [Result] The precision and accuracy of the method all met the requirements of the investigation program. The recovery rates ranged from 90.4% to 108.2%. The relative standard deviations of different components ranged from 0.52% to 8.27%. Of the 13 volatile organic compounds, dichloromethane, 1,1,1-trichloroethane, benzene, 1,2-dichloroethane, toluene, chlorobenzene, ethylbenzene, Xylene, 1,4-Dichlorobenzene and 1,2-Dichlorobenzene. According to Surface Water Environmental Quality Standard, the quality of water bodies was evaluated, and none of the detected volatile organic compounds were exceeded. [Conclusion] The surface water of this survey detected a variety of volatile organic compounds, of which 1,2-dichloroethane concentration was the highest, should be to strengthen the management of 1,2-dichloroethane emissions to prevent further deterioration of water quality.