NEW SPECTROPHOTOMETRIC METHODS FOR THE DETERMINATION OF SCANDIUM, YTTRIUM, AND BROMATE

Thesis/Dissertation · Mon Jan 01 04:00:00 EST 1962

OSTI ID:4699158

MacDonald, J C

New spectrophotometric methods for the determination of scandium, yttrium, and bromate, respectively. have been developed. Scandium and yttrium react non-selectively with anthrarufin-2,6-disuifonic acid (disodium salt) to give one to one complexes which obey Beer's law. The sensitivity of the scandium reaction is one part in 250 million and that for yttrium is one part in 200 million. Ion exchange with Dowex-1 X 8 and solvent extraction with dibutyl phosphate, tributyl phosphate, and thenoyltrifluoroacetone were investigated. Separation procedures were developed for scandium and yttrium. The scandium separation procedure was successfully applied to six salt solutions containing various trace amounts of this element. Bromate reacts with o-arsanilic acid to give a reddish-brown color. This reaction, though somewhat unstable, was developed into a spectrophotometric method for traces of bromate. The method is sensitive to one part of bromate in 20 million parts of solution. The effects of pH, time, and temperature are critical and must be carefully controlled. (A.G.W.)

• Research Organization: Originating Research Org. not identified
• NSA Number: NSA-17-019987
• OSTI ID: 4699158
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

ACETONE
ACIDITY
AMINO ACIDS
ARSANILIC ACID
ARSONIC ACID
BROMATES
BUTYL PHOSPHATES
CHEMICAL REACTIONS
CHEMISTRY
COLOR
EFFICIENCY
FLUORINATED HYDROCARBONS
ION EXCHANGE
PHOTOMETRY
QUANTITATIVE ANALYSIS
SCANDIUM
SCANDIUM COMPLEXES
SENSITIVITY
SOLVENT EXTRACTION
SPECTROSCOPY
SULFONIC ACIDS
TEMPERATURE
TRACE AMOUNTS
YTTRIUM
YTTRIUM COMPLEXES