Analytical Sciences

Determination of 17 Kinds of Banned Organochlorine Pesticides in Water by Activated Carbon Fiber-Solid Phase Microextraction Coupled with GC-MS

Tonghua SUN, Jinping JIA, Dengjie ZHONG, and Yalin WANG

School of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, P. R. China

Activated carbon fiber (ACF) as extraction fiber for solid-phase microextraction (SPME) and its application for the analysis of banned organochlorine pesticides (OCPs) were investigated. Firstly, ACF was activated by different concentration of zinc chloride, which indicated that ACF activated by 60% zinc chloride had a reasonable specific surface area, pore volume and pore distribution. Secondly, the parameters for the ACF-SPME procedure, the adsorption and desorption conditions, were also optimized when coupled with gas chromatography-mass spectrometry (GC-MS). Thirdly, the ACF-SPME was used to analyze 17 kinds of OCPs in water. The linearity of most pesticides was found to be between 0.2 and 50 µg/l with GC-MS under the selected ion monitoring (SIM) acquisition mode. The limits of detection (LOD) at the sub µg/l were obtained. The work demonstrated here shows that ACF is a promising alternative for the SPME procedure.

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