 ISSN 0235-7216 ISSN 2424-4538 (online) |
2007 m. Nr. 3 Solid-phase microextraction of parabens by
polyaniline–polypyrrole coating
A solid-phase microextraction fibre based on the electrochemically deposited polyaniline–polypyrrole coating has been suggested for the extraction and consequent gas chromatographic determination of parabens. The parameters affecting the extraction of analytes, such as extraction time, salt addition, desorption temperature and time, have been investigated. Optimized direct extraction was carried out at room temperature for 30 min in the presence of 0.4 g mL–1 of NaCl in the sample solution. Desorption of the analytes was carried out at 280 oC for 15 min. Precision, linearity and detection limits were determined. The coating was applied for the determination of parabens in cosmetics. Keywords: solid phase microextraction, polyaniline–polypyrrole coating, gas chromatography, parabens |
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