A new solid phase microextraction fiber for aromatic hydrocarbons

A novel solid phase microextraction fiber for the extraction and consequent gas chromatographic determination of benzene, toluene, ethylbenzene, o-xylene and p-xylene is suggested. The fiber was prepared by coating a stainless steel wire with a thin film of a high temperature Silicone Temperature adhesive. The parameters affecting the extraction and gas chromatographic determination of analytes, such as extraction temperature and time, salt addition, desorption temperature and time were investigated. An optimised headspace extraction was carried out at room temperature for 20 min in the presence of 0.4 g mL –1 of NaCl in the sample solution. Desorption of the analytes was carried out for 60 s at 260 °C. The accuracy, linearity, detection limits were determined.