Speciation and preconcentration of chromium in real samples by magnetic polythiophene nanoparticle solid-phase extraction (SPE) coupled with microsampling injection – flame atomic absorption spectrometry (FAAS)
| Autor: | Aysen Hol, Nilgün Elyas Sodan, Sukru Gokhan Elci, Latif Elci, Aslıhan Arslan Kartal |
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| Rok vydání: | 2021 |
| Předmět: |
inorganic chemicals
Microextraction Sorbent General Chemical Engineering media_common.quotation_subject water chemistry.chemical_element Nanoparticle 02 engineering and technology 01 natural sciences soil flame atomic absorption spectrometry (MIS-FAAS) Mercury Speciation chemistry.chemical_compound Chromium Adsorption Flame atomic absorption spectrometry preconcentration otorhinolaryngologic diseases Solid phase extraction Instrumentation General Environmental Science media_common microsample injection system – Nanocomposite Environmental-Samples 010401 analytical chemistry Extraction (chemistry) technology industry and agriculture hair Soil Samples Coated Fe3o4 Nanoparticles 021001 nanoscience & nanotechnology urine 0104 chemical sciences Speciation speciation chemistry Polythiophene Carbon Nanotubes chromium strawberry 0210 nano-technology Copper Nuclear chemistry |
| DOI: | 10.6084/m9.figshare.14597707.v1 |
| Popis: | Magnetic solid-phase extraction was evaluated using polythiophene nanoparticles (Fe3O4@PTh) as the adsorbent for chromium speciation from water samples and total chromium preconcentration from food, biological, and soil samples. Chromium concentrations were determined by microsample injection system – flame atomic absorption spectrometry (MIS-FAAS). Chromium speciation was achieved with selective adsorption of Cr(III) in the presence of Cr(VI) by Fe3O4@PTh from pH 6.5 to 10.0. Total chromium was preconcentrated after the reduction of Cr(VI) to Cr(III). The linear range, detection limit, enrichment factor, and repeatability of the optimized method for Cr(III) in aqueous solution were 4-60 µg L−1, 1.3 µg L−1, 124.7, and 2.2%, respectively. The method was validated by analyzing SPS-WW2 Batch 114, NCS DC 78302 Tibet soil, and LGC7162 strawberry leaves as standard reference materials (SRMs). The results are in good agreement with the certified values. Good recovery, precision, and relative error values were obtained for chromium in real samples by the optimized method. |
| Databáze: | OpenAIRE |
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