Flow injection analysis for beryllium determination with chrome azurol s as chromogenic agent

Journal Article · Tue Dec 01 04:00:00 EST 1992 · Analytical Letters; (United States)

DOI:https://doi.org/10.1080/00032719208017963· OSTI ID:6947652

Kutsera, L; Ghaziaskar, H; Lai, E P.C. ^[1]

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1. Carleton Univ., Ottawa, Ontario (Canada)

A flow injection analysis system which employs a visible absorption detector is used for the determination of beryllium. Be(II) ions are detected by means of a complexation reaction between Be(II) and chrome azurol s as the chromogenic reagent. The reaction forms a stable 1:1 complex which appears dark red-violet. The optimum conditions for the determination are pH 4.15, 35% chrome azurol s, 3% buffer, 62% HCl and 1,3-phenylenediamine, flow rate of 1.0 mL/min, and wavelength at 570 nm. A concentration limit of 0.1 [mu]g/mL (or 2 ng in 25 [mu]L of a sample injected) of Be(II) can be detected, and the linear dynamic range extends to 100 [mu]g/mL. Some interference limits are established in the presence of EDTA and thiosulfate which are used as masking agents.

• OSTI ID: 6947652
• Journal Information: Analytical Letters; (United States), Journal Name: Analytical Letters; (United States) Vol. 25:12; ISSN ANALBP; ISSN 0003-2719
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400102* -- Chemical & Spectral Procedures
ALKALINE EARTH METALS
AMINO ACIDS
BERYLLIUM
CARBOXYLIC ACIDS
CHELATING AGENTS
CHEMICAL ANALYSIS
CHEMICAL REACTIONS
COMPLEXES
EDTA
ELEMENTS
EQUIPMENT
FLOW RATE
METALS
ORGANIC ACIDS
ORGANIC COMPOUNDS
PH VALUE
PORTABLE EQUIPMENT
QUANTITATIVE CHEMICAL ANALYSIS
SALTS
SPECTROPHOTOMETRY
THIOSULFATES