Determination of cadmium in herbs by SFODME with ETAAS detection
| Autor: | Gareth M. Ross, Arnon Thongsaw, Richmond J. Ampiah-Bonney, Ratana Sananmuang, Wipharat Chuachuad Chaiyasith |
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| Rok vydání: | 2017 |
| Předmět: |
Calibration curve
Relative standard deviation chemistry.chemical_element Naphthols 02 engineering and technology 01 natural sciences Analytical Chemistry law.invention law Detection limit Cadmium Chromatography Spectrophotometry Atomic 010401 analytical chemistry Temperature General Medicine Plants 021001 nanoscience & nanotechnology 0104 chemical sciences Solvent chemistry Reagent 0210 nano-technology Atomic absorption spectroscopy Water Pollutants Chemical Food Science |
| Zdroj: | Food Chemistry. 219:453-458 |
| ISSN: | 0308-8146 |
| Popis: | A method for the determination of cadmium in herb samples based on solidified floating organic drop microextraction (SFODME) using 1-(2-Pyridylazo)-2-naphthol (PAN) as a chelating reagent and detection by electrothermal atomic absorption spectrometry (ETAAS) was developed in the present work. The effects of pH, extraction solvent, extraction time, stirring rate, and extraction temperature were investigated. Under the optimized conditions, the calibration graph was linear in the range of 0.017-3.0μgL-1, with a detection limit (LOD) of 0.0052μgL-1. The relative standard deviation (%RSD) for 6 replicate measurements of 1.0μgL-1 cadmium was ±2.67%. The method was applied to the analysis of 10 types of Thai herb samples. Percentage recoveries were in the range 94.5-110.2%. It was found that cadmium concentrations in all Thai herb samples were less than the maximum residue level. |
| Databáze: | OpenAIRE |
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