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The Use of 1,3-Dimethylvioluric Acid in Spectrophotometric Titrations of Alkali and Alkaline Earth Salts

Journal Article · · Analytical Chemistry
DOI:https://doi.org/10.1021/ac60184a026· OSTI ID:4803407
A spectrophotometric study was made of the lithium, sodium, potassium, rubidium, cesium, beryllium, and magnesium salts of 1,3-dimethyl-5- isonitrosobarbituric acid (1,3-dimethylvioluric acid, DMVA). The applicability of DMVA for the spectrophotometric titration of alkali and alkaline earth salts in aqueous solution was investigated. These metals were determined with an accuracy that ranged from 1 to 10 parts per thousand in 0.01 to 0.00001M concentrations. At these concentrations the precision, expressed as standard deviation, ranged from 01.3 to 1.5%. Separation and thermal decomposition of potassium tetraphenylborate yielded water-soluble potassium borate which was titrated spectrophotometrically by DMVA.
Research Organization:
Univ. of Washington, Seattle
Sponsoring Organization:
USDOE
NSA Number:
NSA-16-012968
OSTI ID:
4803407
Journal Information:
Analytical Chemistry, Journal Name: Analytical Chemistry Journal Issue: 4 Vol. 34; ISSN 0003-2700
Publisher:
American Chemical Society (ACS)
Country of Publication:
Country unknown/Code not available
Language:
English