Speciation of chromium in blood samples based on dithioglycerol immobilized on carbon nanotube by dispersive micro solid phase bioextraction
Publish Year: 1399
نوع سند: مقاله ژورنالی
زبان: English
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شناسه ملی سند علمی:
JR_AMECJ-3-3_006
تاریخ نمایه سازی: 14 آذر 1402
Abstract:
A novel method based on the synthesis of dithioglycerol immobilized
on carbon nanotubes (CNTs@DTG) was used for speciation of
chromium (Cr III and Cr VI) in human blood samples by dispersive
micro solid-phase bioextraction (D-μ-SPBE). By procedure, a
mixture containing acetone and ۱-octyl-۳-methylimidazolium
hexafluorophosphate ([OMIM][PF۶]) and CNTs@DTG were injected
into ۵ mL of standard and blood sample containing ۱.۰ μg L-۱ of Cr
III and Cr VI which was diluted with DW up to ۱۰ mL at optimized
pH. The Cr (VI) anions and Cr (III) cations were efficiently extracted
by HS of CNTs@DTG at pH ۲ and ۶, respectively (HS.....Cr) and
trapped into IL phase at the bottom of the conical tube. Then, Cr (III)
and Cr(VI) ions were back-extracted from the IL/ CNTs@DTG to the
aqueous phase by changing pH for each of them before determined
by electrothermal atomic absorption spectrometry (ETAAS). Total
chromium was calculated by summarizing Cr III and Cr VI content.
The enrichment factor (EF), linear range and limit of detection (LOD)
were obtained ۹.۸۵, ۰.۱۲-۳.۸۸ μg L-۱ and ۳۰ ng L-۱, respectively.
Validation of the methodology was confirmed with standard addition
to real samples and ICP-Ms analysis.
Keywords:
Chromium , Speciation , Blood sample , Dithioglycerol immobilized on carbon nanotubes , Dispersive micro solid phase
bioextraction
Authors
Nafiseh Esmaeili
Department of chemistry, Faculty of Science, Semnan University, Semnan, Iran
Eskandar Kolvari
Department of chemistry, Faculty of Science, Semnan University, Semnan, Iran
Jamshid Rakhtshah
Department of Inorganic Chemistry, Faculty of Chemistry, University of Tabriz, Tabriz, Iran