Abstract
A method for the determination of beryllium by ion-exchange chromatography followed by post-column derivatization with 4,5-dihydroxy-3-(8-hydroxy-3,6-disulpho-1-naphtylazo)naphthalene-2,7-disulphonic acid (Beryllon II) and spectrophotometric detection at 625 nm is described. With injection of 50 μl of the sample, the calibration graph was linear from at 50 to 5000 μ/l of beryllium with a detection limit (3σ) of 42 μg/l. The detection limit for direct injection of a 500-μl volume is 2 μg/l. Typical relative standard deviation of 0.9–0.2% and 1.5–2.0% for 10 mg/l and 10 μg/l beryllium standards, respectively, were obtained. Freedom from interference from nine cations investigated is reported. The method was applied successfully to the determination of low levels of beryllium in environmental samples.
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