Spectrophotometric determination of beryllium with chrome azurol s-application to waters

الملخص EN

A simple, rapid and direct spectrophotometric method for the determination of beryllium II is described.

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 cultured 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 clouded 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.