Spectrophotometric Determination of Beryllium with Chrome Azurol S -Application to Waters | Zendy

Bassima A. Abed Al-Hadi | Zendy

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Spectrophotometric Determination of Beryllium with Chrome Azurol S -Application to Waters

Author(s) -

Bassima A. Abed Al-Hadi

Publication year - 2012

Publication title -

mağallaẗ ʻulūm al-rāfidayn

Language(s) - English

Resource type - Journals

eISSN - 2664-2786

pISSN - 1608-9391

DOI - 10.33899/rjs.2012.44398

Subject(s) - beryllium , cetylpyridinium chloride , molar absorptivity , masking agent , chemistry , spectrophotometry , nuclear chemistry , absorption (acoustics) , color reaction , analytical chemistry (journal) , reagent , inorganic chemistry , chromatography , materials science , pulmonary surfactant , biochemistry , physics , organic chemistry , optics , composite material

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 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 1.02×10 4 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.

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