| 摘要: |
| 通过测定标准样品和实际样品，对自动在线监测仪测定地表水中19种挥发性有机物(VOCs)的适用性进行了探讨。结果表明，自动在线监测仪测定19种VOCs的检出限为0.02 ~0.11 μg/L，相关系数＞0.995，相对标准偏差为1.2%~3.6%（n=6），加标回收率为91.9%~102%，精密度和准确度良好，可以满足地表水痕量VOCs的测定需求。因干扰物的存在，在线仪器无法准确定性或定量某些目标物，特别是低沸点、出峰早的二氯甲烷和氯仿。从在线仪配置角度剖析了在线仪器测定不准确的原因，提出，通过测试复杂标准样品，建立备用色谱程序和建设超标留样系统，提升自动在线监测仪定性的准确性。 |
| 关键词: 挥发性有机物 自动在线监测仪 气相色谱-质谱联用仪 地表水 |
| DOI： |
| 分类号:X853 |
| 文献标识码:B |
| 基金项目:国家水体污染控制与治理科技重大专项基金资助项目（2017ZX07201004） |
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| Discussion on the Suitability for Determination of 19 Kinds of Volatile Organic Compounds in Surface Water by Automatic On line Monitor |
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YE Lu, YU Hua-ming, TAI Jing-jing, RUAN Yu-shu，ZHOU Yi-hui1,2,3
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1. Jiading District Environmental Monitoring Station，Shanghai 201822，China;2.Key Laboratory of Yangtze River Water Environment 〈Ministry of Education〉,Tongji University, Shanghai 200092，China;3.State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University，Shanghai 200092，China
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| Abstract: |
| Through the determination of standard and actual samples, the suitability for determination of 19 kinds of volatile organic compounds (VOCs) in surface water by automatic on line monitor was discussed. The result showed that the detection limits of 19 kinds of volatile organic compounds by automatic on line monitor were 0.02 ~0.11 μg/L, the correlation coefficients of calibration curve were more than 0.995, the relative standard deviations were 1.2%~ 3.6%(n=6), the recoveries were 91.9%~102%.The precision and accuracy were good that automatic on line monitor can meet the need of the determination of trace VOCs in surface water. Because of the presence of interference, automatic on line monitor can not accurately qualitify or quantify certain components, such as dichloromethane and chloroform, which had low boiling point and short retention time. For testing complex standard samples, setting up standby chromatographic procedures and building a sample retention system, the qualitative accuracy can be improved, and the accuracy of data can be improved. |
| Key words: Volatile Organic Compounds Automatic on line monitor GC MS Surface water |
