Hollow Fiber-Stir Bar Sorptive Extraction and Gas Chromatography-Mass Spectrometry for Determination of Organochlorine Pesticide Residues in Environmental and Food Matrices.

A method of hollow fiber-stir bar sorptive extraction (HF-SBSE) coupled with gas chromatography-mass spectrometry was proposed to explore the migration of eight organochlorine pesticide residues in environmental and biological matrices. HF-SBSE was a configuration for solid-phase microextraction purposes, combining the features of SBSE and hollow fiber membrane extraction technology. Variables affecting the extraction (salt addition, extraction temperature, and time) and desorption (microwave time, eluted solvent) have been evaluated. Under the optimal conditions, good linearity ( r > 0.999) of all calibration curves was obtained in validation experiments. The recoveries in different sample matrices were in the range from 69.0 to 114.1% with RSD% less than 10.2%. The bio-accumulation of OCPs was tested in samples of soil, underground water, forage grass, and raw milk. It was indicated that HF-SBSE could be applied in simultaneous extraction of hazardous substances in different matrices without sample clean-up. [ABSTRACT FROM AUTHOR]