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 -> magnesium aluminum

Citations 1

"Microporous Polytetrafluoroethylene Tube Separator For The Determination Of Beryllium By Flow Injection Or Suction-flow-solvent Extraction Followed By ICP Atomic Emission Spectrometry"
J. Anal. At. Spectrom. 1988 Volume 3, Issue 3 Pages 441-445
Manabu Yamamoto, Yoichi Obata, Yoko Nitta, Fumio Nakata and Takahiro Kumamaru

Abstract: A Mg - Al alloy (0.025 to 0.1 g) was dissolved in 6 M HCl. A few drops of HClO4 were added, the solution was evaporated nearly to dryness, and the residue was dissolved in 3 M HCl (25 ml). Copper alloys (0.15 g) could be dissolved similarly, but without the addition of HClO4. The acid solution were mixed with aqueous 7% acetylacetone, with 2 M acetate - 8% EDTA buffer solution (pH 7) as a masking agent, and CCl4 as extractant. The separator comprised an inner micro-porous PTFE tube (10 cm x 1 mm i.d., 2 mm o.d.; porosity 70%), through which flowed the mixed phase, and an outer PTFE tube (3 mm i.d.) which removed the separated organic phase. Portions (5 ml) of the organic extract were acidified with HNO3, the mixtures were evaporated nearly to dryness, and the residues were re-evaporated from HNO3, then dissolved in 0.5 M HNO3 for determination of Be by graphite-furnace AAS or ICP-AES (details given). The calibration graph for AES was rectilinear from 5 ppb to 100 ppm. For a 0.5 mL (50 ppb) Be sample, with sample and organic flow rates of 1.2 and 0.7 mL min-1, respectively, the detection limit was 1.2 ng and the coefficient of variation (n = 10) was 1.3%. The extraction conditions were optimized.
Beryllium Spectrophotometry Spectrophotometry Sample preparation Extraction Method comparison Optimization Solvent extraction Teflon membrane