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Preparation and application of poly(dimethylsiloxane)/β-cyclodextrin solid-phase microextraction fibers

✍ Scribed by Yue-li Fu; Yu-ling Hu; Yan-jie Zheng; Gong-Ke Li

Publisher
John Wiley and Sons
Year
2006
Tongue
English
Weight
700 KB
Volume
29
Category
Article
ISSN
1615-9306

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✦ Synopsis

Abstract

A novel poly(dimethylsiloxane)/β‐cyclodextrin (PDMS/β‐CD) coating was prepared for solid‐phase microextraction (SPME). The PDMS/β‐CD coating proved to have a porous structure, providing high surface areas and allowing for high extraction efficiency. The coating had a high thermal stability (340°C) and a long lifetime due to its chemical binding to the fiber surface. Polar phenols and amines were used to evaluate the character of the coating fiber by headspace (HS) extraction and thermal desorption, followed by GC–FID analysis. Parameters that affected the extraction process were investigated; these include extraction time and temperature, desorption time, pH, and ionic strength of the solution. For phenols, the range of linearity of the method was 4–500 μg/L and the LOD was 1.3–2.1 μg/L. For amines, the range of linearity was 1–1000 μg/L and the LOD was 1.2–2.8 μg/L. The presence of β‐CD not only increases the thermal stability of the fiber coating, but also enhances its selectivity. Compared with commercially available SPME fibers, the new phases show better selectivity and sensitivity towards polar compounds.

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