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Asiabi H, Yamini Y, Seidi S, et al. On-line electrochemically controlled in-tube solid phase microextraction of inorganic selenium followed by hydride generation atomic absorption spectrometry. Anal Chim Acta. 2016;922:37-47doi: 10.1016/j.aca.2016.04.001.
Asiabi, H., Yamini, Y., Seidi, S., Shamsayei, M., Safari, M., & Rezaei, F. (2016). On-line electrochemically controlled in-tube solid phase microextraction of inorganic selenium followed by hydride generation atomic absorption spectrometry. Analytica chimica acta, 92237-47. https://doi.org/10.1016/j.aca.2016.04.001
Asiabi, Hamid, et al. "On-line electrochemically controlled in-tube solid phase microextraction of inorganic selenium followed by hydride generation atomic absorption spectrometry." Analytica chimica acta vol. 922 (2016): 37-47. doi: https://doi.org/10.1016/j.aca.2016.04.001
Asiabi H, Yamini Y, Seidi S, Shamsayei M, Safari M, Rezaei F. On-line electrochemically controlled in-tube solid phase microextraction of inorganic selenium followed by hydride generation atomic absorption spectrometry. Anal Chim Acta. 2016 May 30;922:37-47. doi: 10.1016/j.aca.2016.04.001. Epub 2016 Apr 09. PMID: 27154830.
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Anal Chim Acta. 2016 May 30;922:37-47. doi: 10.1016/j.aca.2016.04.001. Epub 2016 Apr 09.

On-line electrochemically controlled in-tube solid phase microextraction of inorganic selenium followed by hydride generation atomic absorption spectrometry.

Analytica chimica acta

Hamid Asiabi, Yadollah Yamini, Shahram Seidi, Maryam Shamsayei, Meysam Safari, Fatemeh Rezaei

Affiliations

  1. Department of Chemistry, Tarbiat Modares University, P.O. Box 14115-175, Tehran, Iran.
  2. Department of Chemistry, Tarbiat Modares University, P.O. Box 14115-175, Tehran, Iran. Electronic address: [email protected].
  3. Department of Analytical Chemistry, Faculty of Chemistry, K.N. Toosi University of Technology, Tehran, Iran.

PMID: 27154830 DOI: 10.1016/j.aca.2016.04.001

Abstract

In this work, for the first time, a rapid, simple and sensitive microextraction procedure is demonstrated for the matrix separation, preconcentration and determination of inorganic selenium species in water samples using an electrochemically controlled in-tube solid phase microextraction (EC-in-tube SPME) followed by hydride generation atomic absorption spectrometry (HG-AAS). In this approach, in which EC-in-tube SPME and HG-AAS system were combined, the total analysis time, was decreased and the accuracy, repeatability and sensitivity were increased. In addition, to increases extraction efficiency, a novel nanostructured composite coating consisting of polypyrrole (PPy) doped with ethyleneglycol dimethacrylate (EGDMA) was prepared on the inner surface of a stainless-steel tube by a facile electrodeposition method. To evaluate the offered setup and the new PPy-EGDMA coating, it was used to extract inorganic selenium species in water samples. Extraction of inorganic selenium species was carried out by applying a positive potential through the inner surface of coated in-tube under flow conditions. Under the optimized conditions, selenium was detected in amounts as small as 4.0 parts per trillion. The method showed good linearity in the range of 0.012-200 ng mL(-1), with coefficients of determination better than 0.9996. The intra- and inter-assay precisions (RSD%, n = 5) were in the range of 2.0-2.5% and 2.7-3.2%, respectively. The validated method was successfully applied for the analysis of inorganic selenium species in some water samples and satisfactory results were obtained.

Copyright © 2016 Elsevier B.V. All rights reserved.

Keywords: Electrochemically control; In-tube solid phase microextraction; Nanostructured composite; Poly ethyleneglycol dimethacrylate; Polypyrrole; Selenium

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