SPECTROPHOTOMETRIC STUDY OF THE COLOUR REACTION BETWEEN THORIUM IONS AND GALANGIN

Journal Article · Fri Feb 01 04:00:00 EST 1963 · Journal of the Indian Chemical Society (India) Absorbed Indian J. Appl. Chem.

OSTI ID:4727887

Katyal, M; Singh, R P

Galangin (3,5,7-trihydroxyflavone) forms an intense yellow-colored complex wlth thorium ions. The color reaction was investigated for spectrophotometric determination of thorium. The complex shows maximum absorption at 410 m at pH 2.2. The region of maximum absorption shifts slightiy toward the higher wave lengths with increase in pH and at pH 4.2, it occurs at 420 m . The system obeys Beer's law over the pH range 2.2 to 4.2 and the method can be satisfactorily used for spectrophotometric determination of small quantlties of thorium. Molar composition of the complex, as determined by Job's and slope-ratio methods was found to be 1: 1. (auth)

• Research Organization: Univ. of Delhi
• NSA Number: NSA-17-021599
• OSTI ID: 4727887
• Journal Information: Journal of the Indian Chemical Society (India) Absorbed Indian J. Appl. Chem., Journal Name: Journal of the Indian Chemical Society (India) Absorbed Indian J. Appl. Chem. Vol. Vol: 40; ISSN JICSA
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

ABSORPTION
ACIDITY
BIOFLAVONOIDS
CHEMISTRY
COLOR
FLAVONES
GALANGIN
IONS
JOB METHOD
PHOTOMETRY
QUALITATIVE ANALYSIS
QUANTITATIVE ANALYSIS
SPECTRAL SHIFT
SPECTROSCOPY
THORIUM COMPLEXES
TRACE AMOUNTS
VITAMINS