Determination of fluoride in bone by aluminum monofluoride molecular absorption spectrometry
| Autor: | Pathapragada Venkateswarlu |
|---|---|
| Rok vydání: | 1992 |
| Předmět: |
Formic acid
Monofluoride digestive oral and skin physiology Inorganic chemistry chemistry.chemical_element Calcium Phosphate Biochemistry Analytical Chemistry law.invention chemistry.chemical_compound Bone ash chemistry law Aluminium monofluoride Environmental Chemistry Atomic absorption spectroscopy Fluoride Spectroscopy |
| Zdroj: | Analytica Chimica Acta. 262:33-40 |
| ISSN: | 0003-2670 |
| Popis: | Phosphate, by virtue of its intrinsic capacity to form complexes with aluminum, interferes extensively with the aluminum monofluoride molecular absorption spectrometric (MAS) method for fluoride. However, it has now been found that in the presence of calcium there was no such interference when the ratio of phosphate to calcium was similar to that in calcium phosphate. On the other hand, there was an enhancement of the AlF signal. This observation is now the basis of an AlF MAS method for determination of fluoride in bone ash, which is essentially calcium phosphate. The procedure involves injecting formic acid solutions of bone ash and of calcium phosphate-fluoride standards into a graphic furnace and obtaining the AlF absorbances at 227.5 nm. Results of analyses of bone samples obtained by the AlF MAS method are in excellent agreement with those obtained with the fluoride electrode. |
| Databáze: | OpenAIRE |
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