| Autor: |
B. K. Pal, Md. Jamal Uddin Ahmed, Anil K. Chakrabarti |
| Rok vydání: |
1988 |
| Předmět: |
|
| Zdroj: |
Analytica Chimica Acta. 206:351-355 |
| ISSN: |
0003-2670 |
| DOI: |
10.1016/s0003-2670(00)80856-9 |
| Popis: |
The very sensitive fluorimetric determination of selenium(IV) is based on its oxidation of the non-fluorescent 2-(α-pyridyl)thioquinaldinamide in slightly acidic solution (0.05–0.15 M sulphuric acid). The excitation and emission wavelengths are 350 nm and 500 nm, respectively. Linear calibration graphs are obtained for different ranges of selenium concentration between 0.01 ng ml−1 and 0.5 μg ml−1. Over sixty ions either do not interfere or can be masked in the determination of 1 ng ml−1 Se(IV). The method is applied successfully to various synthetic mixtures and to a native sulphur sample. The reaction is fast and the fluorescent system is stable for 24 hours. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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