Electrothermal Atomic Absorption Determination of Chromium in Sediments
| Autor: | Amparo Salvador, Ángel Morales-Rubio, M. J. Marqués, M. de la Guardia |
|---|---|
| Rok vydání: | 1999 |
| Předmět: |
inorganic chemicals
Detection limit Chemistry Analytical chemistry chemistry.chemical_element Analytical Chemistry law.invention Lithium metaborate Chromium chemistry.chemical_compound Ashing law Standard addition Neutron activation analysis Atomic absorption spectroscopy Spectroscopy Neutron activation |
| Zdroj: | Microchemical Journal. 62:363-370 |
| ISSN: | 0026-265X |
| DOI: | 10.1006/mchj.1999.1748 |
| Popis: | An electrothermal atomic absorption spectrometric method has been developed to determine total chromium concentration in natural sediment samples. Samples were mineralized by dry ashing at 550°C and fused at 1100°C for 30 min with lithium metaborate. Dissolved samples were injected in graphite tubes, mineralized at 1100°C, and atomized at 2600°C. Standard addition calibration made unnecessary the use of chemical modifiers. The method provided a limit of detection from 23 to 45 ng liter −1 . The relative standard deviation for chromium determination was between 3 and 14%. Results obtained for a standard reference material agree well with the certified value. A series of natural samples were analyzed by the developed procedure and also directly by neutron activation analysis without any pretreatment and comparable results were obtained by both procedures. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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