Determination of Pentachlorophenol in Water by Headspace Solid Phase Microextraction Gas Chromatography / 环境与健康杂志

ABSTRACT

Objective To study the method for determination of pentachlorophenol(PCP) in water by headspace solid phase microextraction(SPME) gas chromatography. Methods Pentachlorophenol in water samples was extracted using optimized SPME technology, separated by SE30 chromatographic column and the content of pentachlorophenol in water was determined by electron capture detector (ECD) under the conditions adjusting water samples to pH 2.0, to maintain an agitating equilibrium concentrations at 60 ℃ for 40 min, headspace absorption for 10 min using extraction head holding polyacrylic ester-coated microfiber (0.83 ?m in thickness), desorption at 280 ℃ for 3 min. Results The detection limit of the method was 0.13 ?g/L. The correlation coefficient r=0.999 was noticed in range of pentachlorophenol concentrations 0-12 ?g/L. When adding standard material of pentachlorophenol at concentrations of 1 ?g/L, 6 ?g/L, 10 ?g/L, the recovery rates were 88.9%-105.0%, 88.9%-102.8% and 98.0%-99.5% respectively and the RSD were 4.9%-8.4%, 3.1%-8.5% and 4.0%-5.4%(n=6)respectively. Conclusion The method was simple, sensitive, stable and without solvent pollution, which was an ideal method for determination of pentachlorophenol in water.