收稿日期: 2008-11-29
修回日期: 2008-12-25
网络出版日期: 2001-01-08
基金资助
国家自然科学基金(40821003); NSFC−广东联合基金(U0833003); GIG领域前沿项目(GIGCX-08-07)
Preliminary study of trifluoroacetic acid in surface waters of the Pearl River Estuary and neighboring eastern offshore sea area
Received date: 2008-11-29
Revised date: 2008-12-25
Online published: 2001-01-08
采用衍生化处理和气相色谱-质谱联用分析方法, 测定了珠江口及其以东近海海域表层海水中的三氟乙酸(Trifluoroacetic acid, TFA)含量。珠江口及其以东近岸的红海湾和大亚湾海区TFA浓度范围分别为113—170ng.L–1和202—336ng.L–1。红海湾内海水中TFA的平均水平(279ng.L–1)明显高于外海海水(210ng.L–1), 说明港湾内或其周边地区可能有TFA的点源输入。此外, 外海海水中TFA平均浓度比珠江口高69.1ng.L–1, 表明这种亲水性强、稳定性高的化合物除了已知的人为来源外, 可能还存在未知的人为源或自然源, 使得海洋作为其最终的汇浓度不断累积。
王巧云 , 丁翔 , 王新明 . 珠江口及其以东近海海域表层海水中三氟乙酸的初步研究[J]. 热带海洋学报, 2010 , 29(1) : 46 -50 . DOI: 10.11978/j.issn.1009-5470.2010.01.046
Trifluoroacetic acid (TFA) levels in surface waters of the Pearl River Estuary and neighboring eastern offshore sea area were determined by Gas Chromatography-Mass Spectrometry after derivatization process. TFA levels in surface water ranged from 113 to 170ng.L–1 in the Pearl River Estuary and from 202 to 336ng.L–1 in neighboring Daya Bay and Honghai Bay. The average TFA concentration in coastal waters of the Honghai Bay was 279ng.L–1, which was much higher than that in the water samples from the open sea (210ng.L–1), suggesting possible source input within or around the Honghai Bay. The average TFA level in surface waters of open sea was 69.1ng.L–1 higher than that in surface waters of the Pearl River Estuary, indicating unknown anthropogenic or natural sources leading to accumulation in the ocean as final sink of this strongly hydrophilic and fully persistent chemical.
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