Abstract
The effect of various types of surfactants on the complexation of scandium ions with eriochromecyanine R. The optimal conditions were determined from the light absorption spectra of the dye and complexes with metal ions without surfactants and in the presence of catamine AB, oxyphos B and syntanol DS-10 at various pH values and surfactant concentrations complexation. The presence of catamine AB causes a bathochromic shift in the maximum of light absorption of the complex, increases the contrast of the photometric reaction and the value of the extinction coefficient. The composition of the complexes in the absence and in the presence of catamine AB was determined by saturation and iso- molar series methods. It also increases the molar ratio of Sc : eriochromecyanine R in the complex from 1:2 to 1:3. The conditional stability constants of the complexes were determined by Babko's method, calibration curves were constructed, and the coefficients of molar light absorption were calculated. Oxyphos B has a negative effect on the spectrophotometric characteristics of the complexes. Syntanol DS-10 has practically no effect.
Highlights
The effect of various types of surfactants on the complexation of scandium ions with eriochromecyanine R
The presence of catamine AB causes a bathochromic shift in the maximum of light absorption of the complex, increases the contrast of the photometric reaction and the value of the extinction coefficient
The composition of the complexes in the absence and in the presence of catamine AB was determined by saturation and isomolar series methods
Summary
Изучение влияния ПАВ различного типа на комплексообразование ионов скандия с ксиленоловым оранжевым показало, что в ряде случаев удается существенно улучшить спектрофотометрические характеристики комплексов. Изучение влияния ПАВ на спектрофотометрические характеристики ионов скандия с эриохромцианином R проводили в мерных колбах на 25 мл, при соблюдении следующего порядка сливания растворов: вводили раствор реагента, добавляли 3 мл соответствующего буферного раствора, раствор соли металла, нужное количество ПАВ. Для определения состава комплекса Sc с ЭХЦ в присутствии катамина АБ методом насыщения, в мерные колбы на 25 мл вносили от 1 до 18 мл 2,13·10-4моль/л раствора ЭХЦ, 3 мл буферного раствора с рН 6,15, 1 мл раствора скандия (7,59·10-4 моль/л), 3 мл 1,3·10-3 моль/л раствора катамина АБ и доводили дистиллированной водой до метки.
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