CELLULOSE SUPPORTED THORIUM-ALIZARIN RED S REAGENT FOR FLUORIDE ION DETERMINATION

Journal Article · Mon Sep 01 04:00:00 EDT 1958 · Analytical Chemistry (U.S.) Formerly Ind. Eng. Chem., Anal. Ed.

DOI:https://doi.org/10.1021/ac60141a013· OSTI ID:4310936

Yasuda, S K; Lambert, J L

The reagent and procedure described are the result study of colorimetric methods to produce a color in solution directly proportional to fluoride ion concentration. Fluoride ion in the concentration range to 15 ppm reacts selectively with the reagent to release thorium--Alizarin Red S chelate (absorption maximum, 520 m mu , 520 M/sub mm/) into solution. Concentration limits for a number of possible common interfering ions were determined. A polymeric structure for the reagent and a mechanism for the ion exchange reaction are proposed. The combining ratio of thorium to dye was found to be 1to 2 by gravimetric and spectrophotometric methods. Chelation of thorium through a carbonyl oxygen and the 1- hydroxy group in the Alzarin Red S was substantiated by infrared absorption data. The method should be convenient for rapid visual or spectrophotometric denation of fluoride ion within the conditions speci(auth)

• Research Organization: Kansas State Coll., Manhattan
• Sponsoring Organization: USDOE
• NSA Number: NSA-12-016243
• OSTI ID: 4310936
• Journal Information: Analytical Chemistry (U.S.) Formerly Ind. Eng. Chem., Anal. Ed., Journal Name: Analytical Chemistry (U.S.) Formerly Ind. Eng. Chem., Anal. Ed. Vol. Vol: 30; ISSN ANCHA
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

ABSORPTION
ALIZARIN
CELLULOSE
CHELATES
CHEMICALS
CHEMISTRY
COLOR
DYES
FLUORIDES
INFRARED RADIATION
ION EXCHANGE
IONS
MECHANICS
ORGANIC COMPOUNDS
QUALITATIVE ANALYSIS
QUANTITATIVE ANALYSIS
QUANTITY RATIO
SPECTROMETERS
THORIUM COMPLEXES
THORIUM COMPOUNDS