Chemical Papers

, Volume 69, Issue 6, pp 779–790 | Cite as

Ultra-trace arsenic and mercury speciation and determination in blood samples by ionic liquid-based dispersive liquid-liquid microextraction combined with flow injection-hydride generation/cold vapor atomic absorption spectroscopy

  • Hamid Shirkhanloo
  • Aisan Khaligh
  • Hassan Zavvar Mousavi
  • Mohammad Mehdi Eskandari
  • Ali Akbar Miran-Beigi
Original Paper


A simple, fast, and sensitive method for speciation and determination of As (III, V) and Hg (II, R) in human blood samples based on ionic liquid-dispersive liquid-liquid microextraction (IL-DLLME) and flow injection hydride generation/cold vapor atomic absorption spectrometry (FI-HG/CV-AAS) has been developed. Tetraethylthiuram disulfide, mixed ionic liquids (hydrophobic and hydrophilic ILs) and acetone were used in the DLLME step as the chelating agent, extraction and dispersive solvents, respectively. Using a microwave assisted-UV system, organic mercury (R-Hg) was converted to Hg(II) and total mercury amount was measured in blood samples by the presented method. Total arsenic content was determined by reducing As(V) to As(III) with potassium iodide and ascorbic acid in a hydrochloric acid solution. Finally, As(V) and R-Hg were determined by mathematically subtracting the As(III) and Hg(II) content from the total arsenic and mercury, respectively. Under optimum conditions, linear range and detection limit (3σ) of 0.1–5.0 µg L−1 and 0.02 µg L−1 for As(III) and 0.15–8.50 µg L−1 and 0.03 µg L−1 for Hg(II) were achieved, respectively, at low RSD values of < 4% (N = 10). The developed method was successfully applied to determine the ultra-trace amounts of arsenic and mercury species in blood samples; the validation of the method was performed using standard reference materials.


arsenic mercury microwave assisted-UV system ionic liquid-based dispersive liquid-liquid microextraction hydride generation/cold vapor atomic absorption spectrometry 


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Copyright information

© Institute of Chemistry, Slovak Academy of Sciences 2014

Authors and Affiliations

  • Hamid Shirkhanloo
    • 1
  • Aisan Khaligh
    • 2
  • Hassan Zavvar Mousavi
    • 2
  • Mohammad Mehdi Eskandari
    • 3
  • Ali Akbar Miran-Beigi
    • 3
  1. 1.Iranian Petroleum Industry Occupational and Environmental Health Research Center (IPIOEHRC)Iranian Petroleum Industry Health Research Institute (IPIHRI)TehranIran
  2. 2.Department of ChemistrySemnan UniversitySemnanIran
  3. 3.Research Institute of Petroleum Industry (RIPI)TehranIran

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