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Preparation of novel polydimethylsiloxane solid‐phase microextraction film and its application in liquid sample pretreatment
Author(s) -
Wei Fang,
Zhang FangFang,
Liao Hui,
Dong XuYan,
Li YanHua,
Chen Hong
Publication year - 2011
Publication title -
journal of separation science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.72
H-Index - 102
eISSN - 1615-9314
pISSN - 1615-9306
DOI - 10.1002/jssc.201000603
Subject(s) - polydimethylsiloxane , chromatography , extraction (chemistry) , solid phase microextraction , detection limit , sample preparation , elution , analyte , gas chromatography , materials science , solid phase extraction , desorption , solvent , chemistry , analytical chemistry (journal) , gas chromatography–mass spectrometry , mass spectrometry , adsorption , nanotechnology , organic chemistry
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.