中文摘要：

建立了GC-MS测定7种挥发性多聚氟烷基化合物的方法.目标化合物包括：6∶2与8∶2的氟调醇（FTOH）、全氟辛烷磺酰胺、N甲基或乙基取代的全氟辛烷磺酰胺、以及N甲基或乙基取代的全氟辛烷磺酰胺基乙醇.这些化合物采用气相色谱分离,正化学电离源质谱检测.采用7∶2 sFTOH做内标校正进样体积和仪器响应差.在所采用的色谱柱以及优化的GC-MS条件下,可有效分离目标化合物.目标化合物仪器检测限（S/N=3）为0.20—2.20μg.L-1;定量限（S/N=10）为0.72—7.44μg.L-1,标准曲线线性相关系数r2在0.991—0.997之间,测定10μg.L-1混标相对标准偏差在3.14%—11.4%之间.水样和沉积物样品采用乙酸乙酯萃取,Envi-Carbon石墨碳净化.添加同位素取代的8∶2 FTOH和N-乙基-d5-全氟辛烷磺酰胺基乙醇做替代内标,测定水和沉积物中的回收率.沉积物中目标化合物的回收率在69.9%—135.8%之间,污水处理厂出水回收率在64.3%—98.4%之间.方法检测限与定量限分别为,400 mL水样：0.25—2.75 ng.L-1,0.9—9.3 ng.L-1;1 g泥样：0.10—1.10 ng·g-1,0.36—3.72 ng·g-1.

英文摘要：

The present paper described a method to measure seven volatile polyfluorinated alkyl substances by GC-MS.The target compounds included 6∶2 and 8∶2 fluorotelomer alcohols（FTOH）,perfluoro-1-octanesulfonamide,N-methyl and N-ethyl perfluoro-1-octanesulfonamide,and N-methyl and N-ethyl perfluoro-1-octanesulfonamide ethanol.These chemicals were separated by gas chromatography and detected by positive chemical ionization mass spectrometry（GC/PCI-MS）.7∶2 secondary fluorotelomer alcohol was used as internal standard to calibrate the injection volume and instrument response variance.The chemicals were well separated by the column under the optimized conditions.The detection limits of the instrumental method（defined as S/N=3） ranged from 0.20 to 2.20 μg·L-1,and the limits of quantification（defined as S/N=10） ranged from 0.72 to 7.44 μg·L-1.The linear correlation coefficients of calibration curves were between 0.991—0.997.The relative standard deviations of 10 μg·L-1 standard mixture were between 3.14%—11.4%.Water and sediment samples were extracted with ethyl acetate,and purified by Envi-Carbon.Mass labeled 8∶2 fluorotelomer alcohol and N-ethyl-d5-perfluoro-1-octane-sulfonamide were spiked into sediment and water as surrogate standards to calibrate the recovery.The result showed that the recovery of the target compounds in sediment and water ranged 69.9%—135.8% and 64.3%—98.4%,respectively.The method detection limit and quantification limit were 0.25—2.75 ng·L-1 and 0.9—9.3 ng·L-1 for 400 mL water,and 0.10—1.10 ng·g-1 and 0.36—3.72 ng·g-1 for 1 g sediment,respectively.