GRAVIMETRIC DETERMINATION OF ZIRCONIUM AND HAFNIUM BY AROMATIC CARBOXYLIC ACIDS

Journal Article · Fri May 01 04:00:00 EDT 1964 · Analytical Chemistry (U.S.) Formerly Ind. Eng. Chem., Anal. Ed.

DOI:https://doi.org/10.1021/ac60212a032· OSTI ID:4032199

Mukherji, A K

1,3,5-Benzenetricarboxylic (trimesic) acid, 1,2,4benzenetricarboxylic (trimellitic) acid, and 1,2,4,5benzenetetracarboxylic (pyromellitic) acid are proposed as new reagents for the gravimetric determination of zirconium and hafnium. Bismuth(III) and cerium(IV) are the only interferences and their prior removal presents no difficulty. For 10 determinations of zirconium at a 95% confidence interval, the confidence limit ranges from 0.30 to 0.33 mg for 19.7-mg samples for the three reagents; for hafnium the confidence limit ranges from 0.28 to 0.30 mg for 17.1-mg samples. Five- to 8-mg quantities of zirconium and hafnium can be determined. The precipitates contain the reagent molecule and zirconyl and hafnyl ions in a 1 to 1 ratio. Data on thermal decomposition of the precipitates are presented. (auth)

• Research Organization: Louisiana State Univ., New Orleans
• Sponsoring Organization: USDOE
• NSA Number: NSA-18-019871
• OSTI ID: 4032199
• 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: 36; ISSN ANCHA
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

CHEMISTRY
HAFNIUM
INTERFERING ELEMENTS
ORGANIC ACIDS
PRECIPITATION
QUANTITATIVE ANALYSIS
WEIGHT
ZIRCONIUM