高效液相色谱-串联质谱法测定黄河河口段水中全氟化合物的初步研究
Preliminary Study on Perfluorinated Compounds in Waters from the Yellow River Estuary Area by Utilizing Liquid Chromatography-Mass Spectrometry/Mass Spectrometry
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摘要: 以近年来备受关注的持久性有机污染物——全氟化合物为研究目标物,黄河河口段为目标研究区域,应用高效液相色谱-串联质谱法测定黄河河口段河水、自来水和浅层地下水中的19种全氟化合物含量,描述研究该区域水体中全氟化合物的污染水平和分布规律,并探讨水体中全氟化合物的来源。结果表明,全氟丁酸和全氟辛酸是黄河河口段水体中最主要的全氟化合物,黄河水中的全氟丁酸和全氟辛酸浓度分别为1.61~4.20 ng/L和 2.04~3.36 ng/L。浅层地下水中各待测物检出率都很低;自来水中全氟丁酸和全氟辛酸的浓度分别为1.62~3.24 ng/L和 4.66~9.34 ng/L;自来水与黄河水中全氟化合物的组成特征明显不同。东营地区黄河水中全氟辛烷磺酸的浓度与国内其他北方城市相比浓度相当,明显低于长江水和珠三角地表水;全氟辛酸的浓度与呼和浩特市周边河水以及北京官厅水库中浓度相当,相比国内其他地区处于较低水平。Abstract: Perfluorinated compounds (PFCs) are the permanent organic pollutants that have attracted global concern in recent years. They are widely used in large amounts in many products, such as stain-resistant carpets and fabrics, fire-fighting foam and agrochemicals since they have high thermal and chemical stability. PFC compounds have been detected ubiquitously in the environment. Investigation has been conducted in this work on the contents and distributions of 19 PFCs in river water, shallow ground water and tap water from the Yellow River Estuary Area by Liquid Chromatography-Mass Spectrometry/Mass Spectrometry (HPLC-MS/MS). Furthermore, the source of 19 PFCs is discussed in this paper. The results indicate that PFBA and PFOA are the two major compounds in the Yellow River water with ranges of 1.61~4.20 ng/L and 2.04~3.36 ng/L, respectively. Meanwhile, PFOS was detected at lower levels, ranging from 0.90 to 1.31. PFCs were strongly detected in shallow ground water samples. PFBA and PFOA were also the two major compounds in tap water with ranges of 1.62~3.24 ng/L and 4.66~9.34 ng/L. The concentration profiles of PFCs were different between the river water and tap water. PFOS concentrations in river water from the Dongying Yellow River Estuary area were consistent with surface water in other cities of northern China, but significantly lower than those from the Yangtze River Delta and the Pearl River Delta. PFOA concentrations in river water from the Yellow River Estuary area were consistent with ground river waters in Hohhot and Beijing Guanting Reservoir, but lower than that from other places in China.
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Keywords:
- liquid /
- chromatography-mass /
- spectrometry/mass /
- spectrometry /
- perfluorinated /
- compounds
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