Solid-phase microextraction fiber development for sampling and analysis of volatile organohalogen compounds in air

A green, environmental friendly and sensitive method for determination of volatile organohalogen compounds wasdescribed in this paper. the method is based on a homemade sol–gel single-walled carbon nanotube/silicacomposite coated solid-phase microextraction to develop for sampling and analysis of carbon tetrachloride,benzotrichloride, chloromethyl methyl ether and trichloroethylene in air. application of this method was investigatedunder different laboratory conditions. predetermined concentrations of each analytes were prepared in a home-madestandard chamber and the influences of experimental parameters such as temperature, humidity, extraction time,storage time, desorption temperature, desorption time and the sorbent performance were investigated. underoptimal conditions, the use of single-walled carbon nanotube/silica composite fiber showed good performance,high sensitive and fast sampling of volatile organohalogen compounds from air. for linearity test the regressioncorrelation coefficient was more than 98% for analyte of interest and linear dynamic range for the proposed fiberand the applied gas chromatography-flame ionization detector technique was from 1 to 100 ngml?1. methoddetection limits ranged between 0.09 to 0.2 ngml?1 and method quantification limits were between 0.25 and0.7 ngml?1. single-walled carbon nanotube/silica composite fiber was highly reproducible, relative standarddeviations were between 4.3 to 11.7 percent.