University of North Florida
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Stuart Chalk, Ph.D.
Department of Chemistry
University of North Florida
Phone: 1-904-620-1938
Fax: 1-904-620-3535
Website: @unf

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Classification: Alloy -> copper beryllium

Citations 2

"Determination Of Beryllium In Copper-beryllium Alloys By Flow Injection Spectrophotometry"
Fresenius J. Anal. Chem. 1981 Volume 309, Issue 5 Pages 363-364
Tadashi Mochizuki and Rokuro Kuroda

Abstract: A method is described for the flow-injection spectrophotometric determination of beryllium in Cu-Be-alloys using xylenol orange as reagent. Cu, Co and Fe are masked by means of thiosulphate and EDTA. Absorbance is measured at the maximum of 493 nm. With a flow rate of 4 ml/min 60 samples can be analyzed per hour with a relative standard deviation of about 1%.
Beryllium Spectrophotometry

"Determination Of Beryllium With Salicylidene - Ethylenediamine By Flow Injection Fluorimetry"
Bunseki Kagaku 1992 Volume 41, Issue 1 Pages 11-16

Abstract: Sample solution (65 µL, containing 65 ng of Be) is injected into a carrier stream of water that merges with a stream of 0.6 M ethylenediamine - 0.25 mM salicylaldehyde (pH 8.5); the mixture is passed through a 1-m mixing coil and a 12 µL flow cell for measurement of the fluorescence at 435 nm (excitation at 335 nm). The calibration graph is rectilinear for 0.7 ppb to 1.0 ppm of Be and the detection limit is 0.2 ppb. The coefficient of variation (n = 10) at 5 ppb of Be was 0.7%. The sampling rate is 30 h-1. Up to a 1000-fold concentration. of Al with respect to Be can be masked with triethanolamine. Results agreed well with those obtained by ICP-AES. Fluorimetric determination of Be by flow injection analysis was investigated based on the formation of Be Schiff base complex by the reaction of ethylenediamine with salicylaldehyde. The calibration curve was linear over the range of 0.7 ppb to 1 ppm of Be. The detection limit was 0.2 ppb (S/N = 3). The relative standard deviation for 5 ppb of Be was 0.68% (n = 10). The sampling rate was 30 samples/h. Al(III) up to 1000-fold concentration. of Be was masked with triethanolamine. The proposed method was applied to the determination of 0.5 ppm Be in Al metals. In this case, the Be was pre-concentrated by the extraction of the Be complex formed with acetylacetone. The method was also successfully applied to Be-Cu alloys.
Beryllium Fluorescence Sample preparation Method comparison Preconcentration Extraction