Speciation of selenium (IV, VI) in urine and serum of thyroid patients by ultrasound-assisted dispersive liquid-liquid microextraction

Volume 3, Issue 03, Pages 5-17, Sep 2020 *** Field: Human Bioanalysis

  • Elham Mosafayian Jahromy Department of Medical Nanotechnology, Faculty of Advanced Sciences and Technology, Tehran Medical Sciences, Islamic Azad University, Tehran, Iran
  • Negar Motakef Kazemi, (Corresponding Author)* Department of Medical Nanotechnology, Faculty of Advanced Sciences and Technology, Tehran Medical Sciences, Islamic Azad University, Tehran, Iran
Keywords: Selenium, Inorganic speciation, Serum and urine, Isopropyl [(IsopropoxyCarbothiolyl) Disulfanyl] Ethane Thioate, Ultrasound-assisted dispersive liquidliquid bio-microextraction


A simple in-vitro speciation of inorganic selenium (SeIV and SeVI) in serum blood and urine of hyperthyroidism and hypothyroidism patients based on isopropyl 2-[(isopropoxycarbothiolyl) disulfanyl] ethane thioate (IICDET) as a complexing agent were studied by ultrasound-assisted dispersive liquid-liquid bio-microextraction procedure (USA-DLLMBE).  In first stage, 100 μL (≈0.1 g) of hydrophobic ionic liquid of [C8MIM][PF6] mixed with IICDET ligand and 100 μL of acetone. Then, the mixture injected to 10 mL of samples at pH=4. After shacking, the Se (IV) ions were complexed by IICDET and extracted to IL at pH=4 (R-S: …Se). The IL phase was separated from sample by centrifuging and inorganic selenium (Se IV) in remained samples was determined by electro thermal atomic absorption spectrometry (ET-AAS) after back extraction of Se (IV). As speciation, the Se (VI) reduced to Se (IV) in acidic pH (HCl, 130OC) and the total Se(T-Se) was obtained at pH=4.  


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How to Cite
Mosafayian Jahromy, E., & Motakef Kazemi, N. (2020). Speciation of selenium (IV, VI) in urine and serum of thyroid patients by ultrasound-assisted dispersive liquid-liquid microextraction. Analytical Methods in Environmental Chemistry Journal, 3(03), 5-17. https://doi.org/10.24200/amecj.v3.i03.109
Original Article