In situ hydrothermal growth of polyaniline coating for in-tube solid-phase microextraction towards ultraviolet filters in environmental water samples
2017
Bu, Yanan | Feng, Juanjuan | Wang, Xiuqin | Tian, Yu | Sun, Min | Luo, Chuannan
A facile, low cost, sensitive and environmentally friendly polyaniline (PANI) coating was prepared onto the basalt fibers (BFs) by in situ hydrothermal growth method. PANI functionalized BFs were placed into a poly(ether ether ketone) (PEEK) tube as a fibers-in-tube solid-phase microextraction (SPME) device. The extraction and analysis processes were carried out by connecting it to high performance liquid chromatography (HPLC). Three ultraviolet filters including 2-hydroxy-4-methoxybenzophenone, phenyl salicylate and 2,4-dihydroxybenzophenone were employed as model analytes. Under the optimal extraction and desorption conditions, online in-tube SPME-HPLC analysis method was established and afforded satisfactory enrichment factors (1323–1555), wide linear ranges (0.06–100μgL−1) with correlation coefficients ranging from 0.9995 to 0.9999, low limits of detection (0.02–0.05μgL−1) and acceptable extraction repeatability (RSD<7.8%, n=6) and preparation repeatability (RSD<9.7%, n=3). The proposed method was successfully applied to the determination of the three ultraviolet filters in two environmental water samples.
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