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
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Hamid Shirkhanloo
, Aisan Khaligh , Hassan Zavvar Mousavi, Mohammad Mehdi Eskandari
und Ali Akbar Miran-Beigi
Abstract
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 ultratrace amounts of arsenic and mercury species in blood samples; the validation of the method was performed using standard reference materials.
References
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Artikel in diesem Heft
- Laser microsampling and multivariate methods in provenance studies of obsidian artefacts
- 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
- Determination of formaldehyde by flow injection analysis with spectrophotometric detection exploiting brilliant green–sulphite reaction
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- Performance and characterisation of CeO2–TiO2–WO3 catalysts for selective catalytic reduction of NO with NH3
- Catalytic wet peroxide oxidation of m-cresol over Fe/γ-Al2O3 and Fe–Ce/γ-Al2O3
- Morphology, structure, and photoactivity of two types of graphene oxide–TiO2 composites
- A novel efficient magnetic core–zeolitic shell nanocatalyst system: preparation, characterization and activity
- Characterisation and coagulation performance of polysilicate–ferric–zinc
- Antioxidant activity of rosemary extracts in solution and embedded in polymeric systems
- Comparison of selected aroma compounds in cultivars of sea buckthorn (Hippophae rhamnoides L.)
- Thio-click approach to the synthesis of stable glycomimetics
- Synthesis of ether-linked [60]fullerene glycoconjugates by nucleophilic cyclopropanation