Abstract
High-performance chelation ion chromatography (HPCIC), involving a chelating silica substrate bonded with aminomethylphosphonic acid, has been developed as a novel technique for the quantitative determination of beryllium in complex matrices. An isocratic separation method, using an eluent containing 1 M KNO 3, 0.5 M HNO 3 and 0.08 M ascorbic acid, allowed the Be 2+ to elute away from the sample matrix peak in under 6 min in a sample containing in excess of 800 mg l −1 matrix metals. A detection limit of 35 μg l −1 Be(II) was found using a post-column reaction involving Chrome Azurol S (CAS), 1 M hexamine and 10 m M EDTA buffered at pH 6. The standard addition curve gave excellent linearity ( R 2>0.999). The procedure was applied to the determination of trace beryllium in a certified sediment sample. The results obtained compared well with the certified value for beryllium.
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