Polythiophene–Chitosan Magnetic Nanocomposite as a Novel Sorbent for Disperse Magnetic Solid Phase Extraction of Triazine Herbicides in Aquatic Media
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- 作者：Alireza Feizbakhsh ; Shokooh Ehteshami
- 关键词：Magnetic micro ; solid phase extraction ; Fe3O4 nanoparticles ; Polythiophene/chitosan magnetic nanocomposite ; Triazines ; Water samples
- 刊名：Chromatographia
- 出版年：2016
- 出版时间：September 2016
- 年：2016
- 卷：79
- 期：17-18
- 页码：1177-1185
- 全文大小：874 KB
- 刊物类别：Chemistry and Materials Science
- 刊物主题：Chemistry
Analytical Chemistry
Organic Chemistry
Pharmacy
Biochemistry
Plant Sciences
Measurement Science and Instrumentation - 出版者：Vieweg Verlag
- ISSN：1612-1112
- 卷排序：79
文摘
In this paper, polythiophene/chitosan magnetic nanocomposite as a novel adsorbent is proposed for the preconcentration of triazines in aqueous samples prior to gas chromatography. The synthesized nanoparticles, magnetic chitosan and polythiophene–chitosan magnetic nanocomposite were characterized by scanning electron microscopy. The magnetic polythiophene–chitosan nanocomposite containing analytes could be removed from the sample solution by applying a permanent magnet. The major factors influencing the extraction efficiency including desorption conditions, nanocomposite components ratio, sorbent amount, extraction time, ionic strength and sample pH were optimized. The developed method proved to be rather convenient and offers sufficient sensitivity and good reproducibility. The limit of detection (S/N = 3) and limit of quantification (S/N = 10) of the method under optimized conditions were 10–30 and 100 ng L−1, respectively. Under the optimum conditions, good linearity was obtained within the range of 100–5000 ng L−1 for all triazines with correlation coefficients >0.9994. The relative standard deviation at a concentration level of 150 ng L−1 was 7–12 %. Furthermore, the method was successfully applied to the determination of triazines in real samples, where relative recovery percentages of 96–102 % were obtained. Compared with other methods, the current method is characterized by easy, fast separation and low detection limits.