Analysis of naphthalene residues in textile samples by GC-FID using sol-gel-derived SPME fiber

Abstract

Solid-phase microextraction (SPME) coupled to gas chromatography (GC) has been developed for the analysis of naphthalene residues in five textiles samples using sol-gel-derived 5,11,17,23-tetra-tert-butyl-25,27-dihydroxy-26,28- diglycidyloxycalix[4]arene/hydroxy-terminated silicone oil fiber. The main parameters affecting extraction and desorption process such as temperature and time were optimized statistically. Compared with four commercial stationary phases and sol-gelderived OH-TSO SPME fiber, this fiber showed statistically highest enrichment capability for naphthalene in the textile sample. SPME-GC-flame ionization detection method showed good linearity for the tested concentration range with regression coefficient being 0.9996. Detection limits was 1.17 ng/g. Relative standard deviations (n = 6) of method at three concentration levels of 1.0, 0.5, and 0.1 μg/g ranged between 1.1 % and 5.4%, which provided good analytical precision. In addition, this fiber had satisfying fiber to fiber and batch to batch reproducibility. Recoveries for the analyte ranged from 78.3% to 102.7%. It indicated that this method developed was an efficient and accurate procedure for determination of naphthalene residues in textiles samples.