Quantitative characterization of trace levels of PFOS and PFOA in the Tennessee River
Quantitative characterization of trace levels of PFOS and PFOA in the Tennessee River
复制标题
DOI：
10.1021/es010780r
复制
发表时间：
2002-04-15
影响因子：
11.4
通讯作者：
Dick, LA
中科院分区：
文献类型：
--
作者：
Hansen, KJ;Johnson, HO;Dick, LA
尽管有证据表明全氟辛烷磺酸和全氟辛酸盐等有机含氟化学品在环境中广泛分布，但这些化合物在工业和商业应用中的多功能性使鉴定进入环境的途径变得复杂。建立了固相萃取-高效液相色谱-负离子电喷雾串联质谱法定量测定饮用水和地表水中痕量有机氟化学物质的方法。使用这种方法，可以在水样中定量测量某些含氟化学物质至25ppt，这一水平远低于计算的饮用水建议水平。为了评估氟化学品在局部地区的分布情况，并确定氟化学品生产设施是否会导致氟化学品的环境水平，在田纳西州迪凯特市一处氟化学品生产地点附近80英里的田纳西河河段收集了40个水样。在整个采样河段中，检测到全氟辛烷磺酸的水平很低（ppt）。测量到的氟化学品浓度在氟化学品生产设施下游有所增加，表明生产废水可能是流入河流的有机氟化学品的一个来源。
Although there is evidence of widespread distribution of organic fluorochemicals such as perfluorooctane sulfonate and perfluorooctanoate, in the environment, the versatility of these compounds in industrial and commercial applications complicates characterization of pathways into the environment. A solid-phase extraction method coupled with HPLC-negative-ion electrospray tandem mass spectrometry was developed to quantitatively measure trace levels of organic fluorochemicals in drinking water and surface water. Using this method, certain fluorochemicals can be quantitatively measured in water samples down to 25 ppt, a level well below calculated drinking water advisory levels. To assess fluorochemical distribution in a localized geography and to ascertain whether fluorochemical manufacturing facilities contribute to environmental levels of fluorochemicals, 40 water samples were collected on an 80-mi stretch of the Tennessee River, near a fluorochemical manufacturing site in Decatur, AL. Low levels (ppt) of perfluorooctane sulfonate were determined throughout the stretch of river sampled. Concentrations of the measured fluorochemicals increased downstream of the fluorochemical manufacturing facility, indicating that effluent from manufacturing is one likely source of organic fluorochemicals into the river.