Solid-Phase Spectrophotometric Determination of Beryllium at ng mL−1

• Published in: Spectroscopy letters 1998-04, Vol.31 (3), p.503-520
• Main Authors: Molina-Díaz, A., Ayora-Cañada, M. J., Pascual-Reguera, M. I.
• Format: Article
• Language: English
• Subjects: beryl; beryllium; chromazurol S; mining waste water; Solid-phase spectrophotometry; underground water
• ISSN: 0038-7010; 1532-2289
• DOI: 10.1080/00387019808002745

A microdetermination method at ng mL −1 level for beryllium by solid-phase spectrophotometry was been developed. Chrome Azurol S was used as chromogenic reagent to form a blue complex which was easily and strongly sorbed and concentrated on a dextran-type anion-exchange resin. The resin-phase absorbances at 594- and 800 nm were measured directly. Beryllium could be determined over the 1.5 - 15.0 ng mL −1 range with a RSD of 2.7 % by using 100 mL of sample solution. The detection limit was 0.21 ng mL −1 . By using only 10 mL of sample solution, the calibration graph was linear over the concentration range 10-85 ng mL −1 , the RSD being 1.2 %. The method was applied to the determination of beryllium in underground and mining waste water samples and in beryl mineral.