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Preparation of novel polydimethylsiloxane solid-phase microextraction film and its application in liquid sample pretreatment

✍ Scribed by Fang Wei; Fang-Fang Zhang; Hui Liao; Xu-Yan Dong; Yan-Hua Li; Hong Chen

Publisher
John Wiley and Sons
Year
2011
Tongue
English
Weight
266 KB
Volume
34
Category
Article
ISSN
1615-9306

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✦ Synopsis

Abstract

In this paper, an extraction approach based on the use of a novel polydimethylsiloxane (PDMS) film as the extraction medium was described. Two kinds of PDMS films with smooth surface and frosted surface were prepared and were practically evaluated for extraction. A model analytical problem, the determination of organochlorine pesticides in water samples, was selected for practical evaluation of the film extraction procedure by direct extraction and solvent desorption, followed by gas chromatography (GC) analysis with electron capture detection (ECD). The main variables affecting the extraction process such as the extraction time, the extraction temperature, the elution conditions, etc. were studied. The method was characterized on the basis of its linearity, precision, and limits of detection. The novel approach was sensitive and precise enough for the detection of the target analytes in the low nanogram per liter range using 5 mL of sample. In fact, limits of detection ranging from 0.77 to 10.25 ng/L were obtained. Compared with the solid‐phase microextraction (SPME) fiber, the robust extraction film has a large extraction capacity, low cost of preparation. Besides, owing to the simplicity of the extraction procedures, in‐site sample preparation for environmental monitor may be realized.

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