Citation: WU Cuiqin, LI Ying, CHANG Shuping, CHEN Yongheng, CHEN Diyun, GONG Jian, XU Liangzhi. Determination of phthalates in water by dispersive liquid-liquid microextraction based on solidification of floating organic drop followed by high performance liquid chromatography[J]. Chinese Journal of Chromatography, ;2018, 36(5): 452-457. doi: 10.3724/SP.J.1123.2017.11060 shu

Determination of phthalates in water by dispersive liquid-liquid microextraction based on solidification of floating organic drop followed by high performance liquid chromatography

1.
School of Environmental Science and Engineering, Guangzhou University, Key Laboratory for Water Quality Security and Protection in Pearl River Delta of Ministry of Education, Guangdong Provincial Key Laboratory of Radio Nuclides Pollution Control and Resources, Guangzhou 510006, China;
2.
Department of Obstetrics and Gynecology, West China Second University Hospital, Sichuan University, Chengdu 610041, China

Received Date: 30 November 2017

Fund Project: National Natural Science Foundation of China (Nos. 21207022, 41473097, 41673110)

A rapid method for the determination of six phthalates (PAEs) in water samples was established by dispersive liquid-liquid microextraction (DLLME) based on solidification of floating organic drop (SFO) coupled with high performance liquid chromatography (HPLC). The influences of the SFO-DLLME parameters on extraction efficiencies were studied. Dodecanol (extraction solvent, 20 μL) was added to the water samples (containing 20 g/L NaCl) at 60℃, and the solution was shaken for 1 min. The results showed that the six PAEs were linear in the range of 2-2000 μg/L with correlation coefficients (r) between 0.9995 and 0.9999. The limits of detection (S/N=3) of the six PAEs ranged from 0.3 to 0.6 μg/L. The proposed method was applied to the analysis of the seven water samples obtained from different sources (tap water, lake water, river water, waste water, sea water, plastic bottled pure water and mineral water), and some PAEs were detected. The recoveries of the six PAEs in the spiked water samples were 84.9%-94.5%, and relative standard deviations were 4.1%-6.8% at three levels of 10, 100 and 1000 μg/L. The method is an environmentally friendly and convenient method for the routine analysis of the PAEs in water samples.
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沈阳化工大学材料科学与工程学院沈阳 110142