Surfactant-assisted emulsification dispersive liquid-liquid microextraction using 2-thenoyltrifluoroacetone as a chelating agent coupled with electrothermal atomic absorption spectrometry for the speciation of chromium in water and rice samples
| Autor: | Wipharat Chuachuad Chaiyasith, Richmond J. Ampiah-Bonney, Ratana Sananmuang, Nattawut Dokpikul |
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| Rok vydání: | 2017 |
| Předmět: |
Chromium
Calibration curve Liquid Phase Microextraction media_common.quotation_subject Analytical chemistry chemistry.chemical_element Food Contamination 02 engineering and technology 01 natural sciences Analytical Chemistry law.invention chemistry.chemical_compound Surface-Active Agents law Limit of Detection Chelation Thenoyltrifluoroacetone media_common Chelating Agents Detection limit Spectrophotometry Atomic 010401 analytical chemistry Water Oryza General Medicine Hydrogen-Ion Concentration 021001 nanoscience & nanotechnology 0104 chemical sciences Speciation chemistry Reagent 0210 nano-technology Atomic absorption spectroscopy Water Pollutants Chemical Food Science |
| Zdroj: | Food chemistry. 246 |
| ISSN: | 1873-7072 |
| Popis: | A novel method was developed by SAE-DLLME for chromium speciation in water and rice samples using 2-thenoyltrifluoroacetone (TTA) as a chelating reagent by ETAAS. The speciation of Cr(III) and Cr(VI) was achieved by complexation of Cr(III)-TTA and the total Cr was measured after reduction of Cr(VI) to Cr. The calibration graph was linear in the range of 0.02–2.50 µg L−1, with a detection limit of 0.0052 µg L−1. The %RSD was in range of 2.90–3.30% at 0.5, 1.5 and 2.5 µg L−1 of Cr(III), n = 5 and the EF was 54.47. The method was applied to chromium speciation and total chromium determination in real samples and gave recoveries in the range of 96.2–103.5% and 97.1–102.7% for Cr(III) and Cr(VI) in water samples and 93.7–103.5% of total Cr in rice samples. The accuracy of the method was evaluated by analysis of SRM 1573a with good agreement compared to the certified value. |
| Databáze: | OpenAIRE |
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