Hollow-fiber-supported liquid-phase microextraction using an ionic liquid as the extractant for the preconcentration of bisphenol A, 17-β-estradiol, estrone and diethylstilbestrol from water samples with HPLC detection
A new method for the determination of 4 EDCs (bisphenol A, 17-β-estradiol, estrone and diethylstilbestrol) in water samples has been developed by using polypropylene hollow fiber supported ionic liquid (IL, 1-Octyl-3-methylimidazolium hexafluorophosphate, ”C8MIM””PF6”) microextraction (HF-LPME) combined with HPLC/UV, which was applied to investigate the pollutions in surface water at Neijiang River located at Zhenjiang, Jiangsu Province.To achieve the optimum extraction efficiencies, several main parameters were investigated.Under the optimal extraction conditions (sample pH, 2.0; volume of extraction solvent, 2.5 μL; ionic strength, 2.57) the proposed method offered: good linearity range, 0.15~100μg L-1, with the correlation coefficients (r2) of 0.9996, 0.9994, 0.9990 and 0.9984, respectively; low LOD, 0.03, 0.05, 0.10, 0.05 μg L-1 (S/N=3) for bisphenol A, 17-β-estradiol, estrone and diethylstilbestrol, respectively; good reproducibility (relative standard deviation, RSD, 8.41%, 7.61%, 9.00%, 7.22%, respectively, n=5); satisfied recoveries (80.2-107.1%, n=5); high enrichment factor, 5240, 3693, 2425 and 2086 for the four chemicals, respectively.Using the proposed HF-LPME, among 15 sampling sites along Neijiang River, bisphenol A, diethylstilbestrol and 17-β-estradiol were detected in some sites, all which were the near suburban sampling sites.The result indicated that the role of municipal sewage is an important source of EDCs contamination.
EDCs Hollow-fiber-supported liquid-phase microextraction HPLC/UV Ionic liquid
Yanmin Zou Zhen Zhang Xiaoling Shao Yao Chen Xiangyang Wu Liuqing Yang
School of Pharmacy,Jiangsu University,301 Xuefu Rd.,212013 Zhenjiang,Jiangsu,China School of the Environment,Jiangsu University,301 Xuefu Rd.,212013 Zhenjiang,Jiangsu,China School of Chemistry & Chemical Engineering,Jiangsu University,301 Xuefu Rd.,212013 Zhenjiang,Jiangsu
国内会议
哈尔滨
英文
548-558
2013-12-01（万方平台首次上网日期，不代表论文的发表时间）