Thermoanalytical Study and Kinetics of New 8-Hydroxyquinoline 5-sulphonic Acid-Oxamide-Formaldehyde Terpolymer Resins
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Spectrophotometric Determination of Tantalum(V) with 5-Iodo-8- -hydroxyquinoline-7-sulphonic Acid
Tantalum(V) reacts with 5-iodo-8-hydroxyquinoline-7-sulphonic acid to form a yellowish coloured complex having maximum absorbance at 405 nm in citric acid medium. The relatively slow reaction at room temperature is completed in 10 minutes at 40 °c. The colour is stable for at least 12 hr. Effects of heating temperature, time, pH, reagent concentration and other variables have been studied. The ...
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A micellar liquid-chromatographic method is proposed for determination of Al(III) as the 8-hydroxyquinoline-5-sulfonic acid derivative, with spectrofluorimetric detection. Cetyltrimethylammonium bromide, a cationic surfactant (0.05 M), was used as mobile phase. The metal chelate was detected at λEx 410 and λEm 510 nm. Response to aluminum is selective in the presence of other metal ions. The me...
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The thermal properties of copper (II) 8hydroxy quinoline -5 sulphonic acid has been investigated. The thermal decomposition occurs in three stages. All the three stages of decomposition follow one after the other without any stable compound in between showing that the complex is volatile. The kinetics of the thermal decomposition of the complex has been studied using thermogravimetry (TG) in co...
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Seventy-eight metal species are examined for fluorescence properties of their chelates with 8-hydroxyquinoline-5-sutfonic acid (HQS); 42 of these fluoresce, many intensely. The optimum pH, determined by ligand ionization vs. hydroxo compiex formation, iles between 5 and 8. Cadmlum forms the most fluorescent complex In a purely aqueous solution. Fluorescence Is enhanced for many metals in surfac...
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ژورنال
عنوان ژورنال: E-Journal of Chemistry
سال: 2009
ISSN: 0973-4945,2090-9810
DOI: 10.1155/2009/612054