Optimization of Ultrasound-Assisted Extraction of Cr, Cu, Zn, Cd, and Pb from Sediment, Followed by FAAS and GFAAS Analysis
| Autor: | Júlio César José da Silva, Aparecida M. S. Mimura, Marcone Augusto Leal de Oliveira, Virginia S. T. Ciminelli |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Chromium
Geologic Sediments Analytical chemistry 02 engineering and technology Ultrasound assisted Mass spectrometry 01 natural sciences Analytical Chemistry Spectrophotometry medicine Environmental Chemistry Pharmacology Chromatography medicine.diagnostic_test Chemistry Spectrophotometry Atomic 010401 analytical chemistry Extraction (chemistry) Sediment 021001 nanoscience & nanotechnology 0104 chemical sciences Zinc Certified reference materials Lead Ultrasonic Waves Standard addition 0210 nano-technology Graphite furnace atomic absorption Agronomy and Crop Science Copper Cadmium Food Science |
| Zdroj: | Journal of AOAC INTERNATIONAL. 99:252-259 |
| ISSN: | 1944-7922 1060-3271 |
| DOI: | 10.5740/jaoacint.15-0090 |
| Popis: | An ultrasound method for simultaneous extraction of Cr, Cu, Zn, Cd, and Pb from sediment, and determination by flame atomic absorption spectrometry (FAAS) and graphite furnace atomic absorption spectrometry (GFAAS) was proposed. The experimental results obtained using analytical curves and the method of standard additions agreed at a confidence level of 95% for all the analytes, as determined by FAAS and GFAAS, indicating no significant matrix effects. Recoveries ranged from 80.1 to 93.7% (certified reference material) and from 89 to 107% (spike tests). The LOD and LOQ results from the method were consistent with the techniques used (FAAS and GFAAS), with high analytical throughput. The proposed method was then used to determine Cr, Cu, Zn, Cd, and Pb in river sediment samples from Rio Doce, Minas Gerais, Brazil. The results indicated levels below those permitted by Brazilian legislation for all the analytes, with the exception of Cr. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|