Digestion method for the determination of mercury in vegetable matrices by cold vapour atomic absorption spectrometry
| Autor: | Francesco Fagioli, Clinio Locatelli, Roberto Vecchietti, Silvio Landi |
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| Rok vydání: | 1990 |
| Předmět: |
Chromatography
medicine.diagnostic_test Chemistry Spectrophotometry Atomic Analytical chemistry chemistry.chemical_element Sulfuric acid Mercury Sulfuric Acids Biochemistry Analytical Chemistry Mercury (element) law.invention chemistry.chemical_compound law Spectrophotometry Vegetables Electrochemistry medicine Environmental Chemistry Potassium Dichromate Atomic absorption spectroscopy Potassium dichromate Spectroscopy Mercury analysis |
| Zdroj: | The Analyst. 115:173 |
| ISSN: | 1364-5528 0003-2654 |
| DOI: | 10.1039/an9901500173 |
| Popis: | A simple and rapid wet-digestion procedure is described for the determination of total mercury in botanical samples by cold vapour atomic absorption spectrometry. The method is based on the oxidising properties of potassium dichromate in dilute sulphuric acid and was tested on two National Institute of Standards and Technology Standard Reference Materials. The mass of the samples taken for analysis was about 0.5 g in all instances, corresponding to an amount of mercury of the order of 0.075-0.040 micrograms depending on the material. The results were compared with those obtained using the Association of Official Analytical Chemists official digestion technique, which involves the use of nitric and sulphuric acids, and a second technique based on the action of nitric and perchloric acids. The proposed method provided better accuracy and showed good precision. Its ability to achieve the decomposition of two organomercurials for full mercury recovery was verified. |
| Databáze: | OpenAIRE |
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