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摘要
A method for the determination of beryllium by ion-exchange chromatography followed by postcolumn derivatization with 4,5-dihydroxy-3-(8-hydroxy-3,6-disulpho-1-naphthylazo)naphthalene-2,7-disulphonic acid (Beryllon II) and spectrophotometric detection at 625 nm is described. With injection of 50-mu-l of the sample, the calibration graph was linear from 50 to 5000-mu-g/l of beryllium with a detection limit (3-sigma) of 42-mu-g/l. The detection limit for direct injection of a 500-mu-l volume is 2-mu-g/l. Typical relative standard deviations of 0.9-0.2% and 1.5-2.0% for 10 mg/l and 10-mu-g/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.
- 出版日期1991-2-1
