Retention of Some Metal Ions and Their Separation on Silica Gel Modified with Acid Red 88 |
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Authors: | Ryszard Kocjan |
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Institution: | (1) Department of Inorganic and Analytical Chemistry, Medical School, 6 Staszica Str., 20-081 Lublin, Poland, PL |
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Abstract: | Acid Red 88 is strongly extracted by chloroform solutions of Aliquat 336 by an ion exchange mechanism and for its reextraction
from the ion pair formed, relatively high concentrations of mineral acids are required. By impregnation of silica with the
ion pairs between the cation of Aliquat 336 and the anion of the dye a chelating sorbent for metal ions can be obtained. The
sorbent prepared may be successfully used for separation of mixtures of various metal ions by the column extraction chromatography
technique, additional purification of sodium and potassium salts from ions of heavy metals and for concentration of trace
amounts of ions of various metals from aqueous solutions followed by their quantitative determination. The sorbent can be
used repeatedly in the process of sorption and desorption of metal ions (especially those forming less stable complexes with
the reagent) after regeneration with solutions of perchloric acid.
Received January 28, 1998. Revision March 1, 1999. |
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Keywords: | , ,Acid Red 88, chelating sorbent, extraction chromatography, purification of alkali metal salts, |
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