title: Estimation of chromium in ores and beneficiated products: an ultrasonic approach.
abstract: Cr(III) slowly forms a violet complex with EDTA at pH 3.5 +/- 0.2 under normal conditions. The complex formation can be catalyzed by irradiating the reacting mixture with ultrasonic waves. Quantitative formation of the complex was possible with ultrasonic waves of 15 W/cm(2) intensity within 7.5 min of sonication. This method may be successfully applied to the determination of chromium in ores and beneficiated products containing 20-60% Cr(2)O(3) without separating the analyte from the matrix elements.
authors.affiliation: Regional Research Laboratory, Council of Scientific & Industrial Research, Bhubaneswar, India.
authors.forename: U
authors.initials: U
authors.lastname: Patnaik
authors.forename: J
authors.initials: J
authors.lastname: Muralidhar