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Citation: FENG Li, ZHANG Shengjun, ZHU Guohua, LI Mufei, LIU Jinsong. Determination of polycyclic aromatic hydrocarbons in surface water using large volume stir bar sorptive extraction coupled with thermal desorption-gas chromatography-mass spectrometry[J]. Chinese Journal of Chromatography, ;2017, 35(4): 466-471. doi: 10.3724/SP.J.1123.2016.11013 shu

Determination of polycyclic aromatic hydrocarbons in surface water using large volume stir bar sorptive extraction coupled with thermal desorption-gas chromatography-mass spectrometry

FENG Li ^1, ,
ZHANG Shengjun ² ,
ZHU Guohua ² ,
LI Mufei ² ,
LIU Jinsong ^1,2

1.
College of Chemical Engineering, Zhejiang University of Technology, Hangzhou 310014, China;
2.
Zhejiang Environmental Monitoring Center, Hangzhou 310015, China

Received Date: 14 November 2016

Fund Project: Zhejiang Major Program of Science and Technology (No. 2014C03026)

A fast and sensitive analytical method for the ultra trace determination of 16 kinds of polycyclic aromatic hydrocarbons (PAHs) in surface water based on stir bar sorptive extraction (SBSE) coupled with gas chromatography-mass spectrometry was established. Multiple stir bars simultaneous enrichment with sequential cryofocusing and merged injection technique was used to effectively solve the problem of long adsorption time and small sample volume with SBSE. The conditions of thermal desorption time, cryofocusing temperature of cooled injection system (CIS), CIS desorption time and extraction time were investigated. Under the optimized conditions, the results showed that the linear range was between 0.2 ng/L and 10 ng/L (naphthalene, 0.5-10 ng/L), and the method detection limits (MDLs) of the 16 PAHs ranged from 0.03 ng/L to 0.20 ng/L (naphthalene, 0.50 ng/L). The 11 PAHs were determined in the Qiantang River surface water samples, and the contents were between 0.13 ng/L and 1.57 ng/L. The recoveries of the 16 PAHs spiked in surface water samples at different levels were between 75.6% and 108.9%. The method can be efficiently applied to the determination of PAHs.
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