Abstract
It was proposed to use two-color acid-base indicator as a reagent for the spectrophotometric determination of the hydroxyl ions. The conditions of OH – -ions determination in aqueous solution with bromothymol blue were investigated. A spectrophotometric technique for the basic impurities determination in cesium iodide that is based on dissolution of the sample in a bromothymol blue solution and absorption measuring at 620 nm was developped. Key words : hydroxyl ions, cesium iodide, spectrophotometry, bromothymol blue. (Russian) DOI: http://dx.doi.org/10.15826/analitika.2013.17.1.016 O.V. Gayduk STC “Institute for Single Crystals” of Ukraine NAS , Kharkоv, Ukraine
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