METAL CHELATES OF RARE EARTHS. I. COMPOSITION, STABILITY, AND ANALYTICAL APPLICATIONS OF ALIZARIN RED S CHELATES OF SCANDIUM AND YTTRIUM

Journal Article · Tue Jan 01 04:00:00 EST 1963 · Microchemical Journal (U.S.)

DOI:https://doi.org/10.1016/0026-265X(63)90083-3· OSTI ID:4071708

Munshi, K N; Sinha, S N; Sangal, S P; Dey, A K

The formation of pink colored chelates between scandium and Alizaiin Red S ( lambda /sub max/ 500 m mu ) and yttrium and Alizarin Red S ( lambda /sub max/ 510 m mu ) at pH 3.0 are reported. Absorbance measurements indicate the composition of the chelates to be 1 : 2 (metal: chelating agent). Adherence to Beer's law is obseived over a wide range of metal concentration; the color intensities are also stable within a wide range of pH. The values of log K (K = stability constant) were calculated by two different methods and are 9.0 and 9.4 for the scandium chelate, and 9.6 and 9.6 for the yttrium chelate (pH = 4.0; temperature = 25 deg C). The effects of pH, temperature, time, and diverse ions of the reactions n the possibl use of Alizarin Red S in the determination of scandium and yttrium. (auth)

• Research Organization: Univ. of Allahabad, India
• Sponsoring Organization: USDOE
• NSA Number: NSA-18-016039
• OSTI ID: 4071708
• Journal Information: Microchemical Journal (U.S.), Journal Name: Microchemical Journal (U.S.) Vol. Vol: 7; ISSN MICJA
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

ABSORPTION
ACIDITY
ALIZARIN
BEER LAW
CHELATES
CHEMICAL REACTIONS
CHEMICALS
CHEMISTRY
COLOR
FREQUENCY
IONS
LIGHT
MIXING
NUMERICALS
ORGANIC NITROGEN COMPOUNDS
PHOTOMETRY
PREPARATION
QUANTITATIVE ANALYSIS
QUANTITY RATIO
RARE EARTHS
REACTION KINETICS
SCANDIUM COMPLEXES
SCANDIUM COMPOUNDS
SOLUTIONS
SPECTRA
SPECTROSCOPY
STABILITY
TEMPERATURE
USES
VARIATIONS
WATER
YTTRIUM COMPLEXES
YTTRIUM COMPOUNDS