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IMPROVING THE SAFETY OF THE SALT. CONTENT DETERMINATION VARIOUS FORMS OF CHROM Abstract: The use of ultrasound for the intensification of sample preparation in the spectrophotometric determination of chromium in common salt and brines is studied: to remove carbon dioxide from the analyzed solutions, to intensify the concentration of chromium (III) by coprecipitation, to oxidize chromium (III) to chromium (VI). A procedure for the determination of chromium (III) and chromium (VI) in common salt and brines has been developed. The limit of detection of chromium in the photometry

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