Spectrophotometric Determination of Beryllium with Chrome Azurol S -Application to Waters | ||
| Rafidain Journal of Science | ||
| Article 8, Volume 23, Issue 3, April 2012, Pages 85-97 PDF (0 K) | ||
| DOI: 10.33899/rjs.2012.44398 | ||
| Author | ||
| Bassima A. Abed Al-Hadi | ||
| Abstract | ||
| A simple, rapid and direct spectrophotometric method for the determination of beryllium II is developed. The method is based on the reaction beryllium II with chrome azurol S in the presence of cetylpyridinium chloride at pH 5.0 forming a stable blue coloured complex which has an intense absorption at 620 nm. Beer's law was obeyed over the range of 0.25-100 μg/25 ml. The molar absorptivity and Sandal's sensitivity of the coloured complex are 1.02×104 l.mol-1.cm-1 and 0.00883 μg.cm-2, respectively. The interference caused by a number of common cations and anions can be removed by using EDTA as a masking agent. The method has been applied successfully to the determination of beryllium II in different water samples. | ||
| Keywords | ||
| Beryllium; Spectrophotometric method; Chrome azurol S; Cetylpyridinium chloride | ||
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