Studies on Separation of Zirconium and Hafnium and Their Microdetermination. IV. Spectrophotometric Determination of Trace of Zirconium or Hafnium with Morin (in Japanese)
Journal Article
·
· Nippon Kagaku Zasshi (Journal of the Chemistry Society of Japan, Pure Chemistry Section)
It was found that morin(5,7,2',4'-tetrahydroxyflavenol) has higher sensitivity than quercetin as a reagent for spectrophotometric determination of zirconium or hafnium. Ethanolic solution of morin has an absorption band with a maximum lying at around 360 m mu , and the complex with zirconium or hafnium has its maximum at around 420 m mu . Optimum conditions for determination are as follows: the concentration of HCI, morin, and ethanol is 0.5N, 3 x 10/sup -4/ mole/l and 30 to 50%, respectively. Working curves follow Beer's law in range of the concentration of 1 to 40 gamma /50 ml of zirconium or hafnium at 410 to 430 m mu . It was revealed that the ratio of morin to zirconium or hafrium in the complex is 2 : 1 by Job's continuous variation method. Use of acetone as the solvent increases the sensitivity of determination. The molar absorbancy index of the zirconium and hafnium complex was found to be 7.30 x 10/sup 4/ and 7.22 x 10/sup 4/, respectively, under the condition of 30% acetone, 4% ethanol, 0.1N HCl, and 2.64 x 10/sup -4/ mole/l morin at 420 m mu .
- Research Organization:
- Tokyo Inst. of Tech.
- Sponsoring Organization:
- USDOE
- NSA Number:
- NSA-15-010894
- OSTI ID:
- 4088743
- Journal Information:
- Nippon Kagaku Zasshi (Journal of the Chemistry Society of Japan, Pure Chemistry Section), Journal Name: Nippon Kagaku Zasshi (Journal of the Chemistry Society of Japan, Pure Chemistry Section) Journal Issue: 8 Vol. 81; ISSN 0369-5387
- Country of Publication:
- Country unknown/Code not available
- Language:
- Japanese
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