Alireza Aliakbar

University of Guilan, Rasht, Ostan-e Gilan, Iran

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Publications (2)8.29 Total impact

  • Mehdi Ashournia, Alireza Aliakbar
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    ABSTRACT: The high tendency of 5-nitropiazselenol for self-accumulation on thin mercury film electrode was used innovatively for determination of Se(IV) in natural waters. 5-Nitropiazselenol was formed by reaction between Se(IV) and 4-nitro-1,2-phenylenediamine in acidic solution and self-accumulation process was carried out directly from reaction media. The adsorbed 5-nitropiazselenol was stripped in HCl solution by DP cathodic potential scan. All parameters influencing the measurement were optimized and evaluated. Detection limit of this method is 0.06 ng mL(-1). Interferences of various cations and anions were studied. The adsorption tendency of some other piazselenols made by some aromatic ortho-diamines was also investigated. The problems arising from applying potential during accumulation process in natural waters analysis were discussed. This method was applied for determination of Se(IV) in natural waters collected from some internationally registrated lagoons south of Caspian Sea. The obtained results were compared with the results of ICP-AES and DPCSV after electrochemical preconcentration.
    Journal of hazardous materials 09/2009; 174(1-3):788-94. · 4.14 Impact Factor
  • Mehdi Ashournia, Alireza Aliakbar
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    ABSTRACT: In this work bovine albumin was used innovatively as a medium for adsorptive accumulation of Se-I(2) on thin mercury film electrode. Se-I(2) was formed by reaction between Se(IV) and iodide in HCl media. The adsorbed Se-I(2) was stripped in 0.05 M HCl by differential pulse cathodic potential scan. The proposed method was successfully applied to analysis of Se(IV) and Se(VI) in natural waters sampled from some lagoons south of Caspian Sea. The optimum reaction conditions and other analytical parameters and influence of cations and anions were studied. The detection limit was 0.37 ng mL(-1). The obtained results were compared with the results of DPCSV after electrochemical preconcentration, HG-AAS and ICP-AES.
    Journal of hazardous materials 03/2009; 168(1):542-7. · 4.14 Impact Factor

Publication Stats

6 Citations
116 Views
8.29 Total Impact Points

Institutions

  • 2009
    • University of Guilan
      • Department of Chemistry
      Rasht, Ostan-e Gilan, Iran