Method for the determination of sub-ppm concentrations of perfluoroalkylsulfonate anions in water
Method for the determination of sub-ppm concentrations of perfluoroalkylsulfonate anions in water
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DOI：
10.1039/b108463c
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发表时间：
2002-02-01
影响因子：
--
通讯作者：
Strauss, SH
中科院分区：
文献类型：
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作者：
Hebert, GN;Odom, MA;Strauss, SH
已通过一种相对简单的质谱程序完成了对亚ppm浓度的全氟烷基磺酸（pfsagger）阴离子（包括全氟辛基磺酸（PFOS））的测定，该程序不需要将分析物萃取到有机溶剂中，也不需要在注入负离子电喷雾电离质谱仪之前进行色谱分离。样品预处理被最小化，包括用乙腈稀释地下水、地表水、自来水和蒸馏水的含水样品。加入十二烷基硫酸酯（DDS）作为内标；在某些情况下。在标准添加实验中添加已知数量的全氟丁基磺酸（PFBS）或全氟辛烷磺酸。全氟辛烷磺酸的线性响应范围为25.0马克杯-1至2.5毫克-1。该范围的下限比同样简单的色谱方法低三个数量级。以133 μ g L-1 DDS为内标，PFOS含量为25.0 μ g L-1和2.5 μ g L-1的标准水溶液相对误差分别为+/-14%和+/-7%。这些标准中全氟辛烷磺酸的检出限和定量限分别为5.0马克杯L-1和25.0马克杯L-1。分别。六种不同的PFS阴离子，含有三到八个碳原子。在水成膜泡沫（AFFF）配方中使用标准添加方法进行鉴定和定量。在AFFF配方中还发现了两个烷基硫酸盐阴离子和两个全氟烷基羧酸阴离子。
The determination of sub-ppm concentrations of aqueous perfluoroalkylsulfonate (PFSdagger) anions, including perfluorooctylsulfonate (PFOS), has been accomplished with a relatively simple mass spectrometric procedure that does not require extraction of the analytes into an organic solvent or a chromatographic separation prior to injection into the negative-ion electrospray ionization mass spectrometer, Sample pretreatment was minimized and consisted of dilution of the aqueous samples of groundwater, surface water, tap water, and distilled water with acetonitrile. addition of dodecylsulfate (DDS) as an internal standard, and. in some cases. addition of known amounts of perfluorobutylsulfonate (PFBS) or PFOS for standard-addition experiments. The linear-response range for PFOS is 25.0 mug L-1 to 2.5 mg L-1. The lower limit of this range is three orders of magnitude lower than an equally straightforward chromatographic method. The relative errors for standard aqueous solutions containing only 25.0 mug L-1 and 2.5 mg L-1 PFOS are +/-14% and +/-7%, respectively, with 133 mug L-1 DDS as the internal standard. The detection limit and quantification limit for PFOS in these standards are 5.0 mug L-1 and 25.0 mug L-1. respectively. Six different PFS anions, containing three to eight carbon atoms. were identified and quantified in an aqueous film-forming foam (AFFF) formulation using the method of standard additions. Two alkylsulfate anions and two perfluoroalkylcarboxylate anions were also identified in the AFFF formulation.