固相萃取-气相色谱法测定北京市水样中的邻苯二甲酸酯

Determination of the phthalates in water samples in Beijing city by solid-phase extraction and gas chromatography

研究了使用毛细管柱(OV-1701)分离、FID作为检测器的气相色谱法测定水中5种邻苯二甲酸酯(PAEs)[邻苯二甲酸二乙酯(DEP),邻苯二甲酸二丁酯(DBP),邻苯二甲酸丁基苄基酯(BBP),邻苯二甲酸二(2-乙基己基)酯(DEHP),邻苯二甲酸二环己酯(DCHP)]的色谱条件.5种PAEs检出限在0.1～0.3μg/L之间,所测PAEs的质量浓度在0.5～100μg/L范围内,RSD在2.2%～3.3%之间,各物质校正曲线(质量浓度与峰面积)的相关系数在0.9970～0.9993之间.利用固相萃取技术萃取水中PAEs,回收率在82.5%～110.5%之间,RSD在1.1%～4.0%之间.北京市吴家村污水处理厂4个采样点中邻苯二甲酸酯浓度在(0.7～193.3)μg/L之间.北京市南护城河的3个采样点中邻苯二甲酸酯浓度在(0.1～241.8)μg/L之间.

A capillary gas chromatographic method with flame ionization detector （GC-FID） for the determination of five phthalate acid esters （PAEs） （diethyl phthalate （DEP）, di-n-butyl phthalate （ DBP）, butyl benzyl phthalate （BBP）, di （2-ethylhexyl） phthalate （DEHP）, dicyclohexyl phthalate （DCHP）） in water samples was developed. There was a good linear relationship in the range of 0.5 - 100μg/L with the low detection limits of 0.1 - 0.3μg/L and RSD of 2.2% - 3.3% . The recoveries obtained for PAEs ranged from 82.5 % to 110.5 % with RSD of 1.1% - 4.0% by solid-phase extraction. The contents of PAEs in water samples in Wujiacun sew- age treatment plant varied from 0.7 to 193.3 μg/L. The contents of PAEs in the water samples of south moat in Beijing varied from 0.1 to 241.8 μg/L.