Xerogels doped with 1-(2-pyridylazo)-2-naphthol and Xylenol Orange: Indicator tubes and indicator powders for determining copper(II) and iron(III) in solution |
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Authors: | E I Morosanova A A Velikorodnyi I V Nikulin E A Puganova Yu A Zolotov |
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Institution: | (1) Department of Chemistry, Moscow State University, Leninskie gory, 119899 Moscow, Russia |
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Abstract: | Silica-based xerogels doped with l-(2-pyrilylazo)-2-naphthol and Xylenol Orange were prepared. The xerogels differ in the
specific surface and the reagent concentration. Modified xerogels were used as indicator powders for determining copper(II)
and iron(III) using indicator tubes. The effects of the reagent concentration in the indicator powder and its specific surface
on the length of the colored zone were studied. Indicator tubes were developed for determining 0.3–300.0 mg/L copper(II) and
1.0–120.0 mg/L iron(III) in solutions. The results of determining copper(II) in plant mineral food and iron(III) in natural
waters and ashed milk powder are presented. |
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