Acta Chimica Sinica ›› 1987, Vol. 45 ›› Issue (5): 489-493. Previous Articles     Next Articles

Original Articles

含氧有机溶剂对用桑色素荧光法测定钪的荧光性质的影响

王怀公;李兰蕴   

  1. 兰州大学化学系
  • 发布日期:1987-05-15

Aqueous solvents effects on the fluorescent properties of fluorometric determination of scandium(III) with morin

WANG HUAIGONG;LI LANYUN   

  • Published:1987-05-15

The solvent effects on the fluorescent properties of fluorometric determination of Sc with morin was investigated. In the presence of organic solvents, the sensitivity and selectivity of fluorescent reaction were greatly increased, e.g. the fluorescent quantum yield of Sc-morin complex and Sc-morin-n-PrOH are 0.056 and 0.325, resp. A highly sensitive fluorescent method for determination of Sc was proposed in the presence of n-PrOH. Beer's law was obeyed for 0-13 mg Sc/25 mL in the Sc-morin-n-PrOH system. The interference of foreign ions was studied. Satisfactory results were obtained in the determination of trace Sc in rare earth samples. The molar ratio of Sc:morin is 1:3. The solvation no. of n-PrOH is 3. The enhancement of fluorescent quantum yield of Sc-morin complex was decreased with the organic solvents in the order of n-PrOH > iso-PrOH > tert-BuOH > acetone > dioxane > EtOH > MeOH > DMSO > H2O. The solvation nos., stability constants of the complexes, and the spectra were determine for the studied solvent systems.

Key words: FLUORIMETRIC ANALYSIS, SOLVENTS, MONOCARBOXYLIC ACID, ORGANIC COMPOUNDS, ACETONE, ALCOHOL, SCANDIUM, ANTIPYRINU, FLUORESCENCE CHARACTERISTIC, MORIN

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