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Spectrophotometric Determination of Scandium (III) with Eriochrome Cyanine R and Cetylpyridinium Chloride – Application to Waters and Synthetic Alloys* | ||
| Rafidain Journal of Science | ||
| Article 6, Volume 20, Issue 6, 2009, Pages 48-65 PDF (0 K) | ||
| DOI: 10.33899/rjs.2009.39972 | ||
| Authors | ||
| Wadala A. Bashir; Lamya A. Sarsam | ||
| Abstract | ||
| The detailed investigation of a sensitive and selective spectrophotometric method for the trace amounts of scandium is described. The method is based on the reaction of scandium with eriochrome cyanine R reagent in the presence of cetylpyridinium chloride surfactant at pH 4.1, to form a violet-blue ternary chelate which exhibits maximum absorption at 595nm. Beer’s law is obeyed over the range 0.1-3.0 µg25ml, i.e., 0.004-0.12 ppm, with a molar absorptivity of 1.3×105 l.mol-1.cm-1, (r=0.9991), Sandell’s sensitivity index of 0.45 ng.cm-2, a relative error of 0.0-0.4% and a relative standard deviation of ±0.6 to ±6.1 %, depending on the concentration level. The method has been applied successfully to determine, scandium in various samples of water and synthetic alloy. | ||
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