Effect of nonionic surfactant micelles on the formation of beryllium complexes with Chromazurol S and Chromazurol B and their use in the spectrophotometric determination of beryllium

Journal Article · Sun Jun 01 04:00:00 EDT 1986 · Anal. Chem.; (United States)

DOI:https://doi.org/10.1021/ac00298a038· OSTI ID:5698070

Hayashi, K; Sasaki, Y; Tagashira, S; Kosaka, E

The triphenylmethane dyes, Chromazurol S (CAS) and Chromazurol B (CAB), react with beryllium to form the dye-rich complexes Be(CAS)/sub 2/ and Be(CAB)/sub 2/ in nonionic micellar solutions. The partition equilibria of the dyes and the complexes were spectrophotometrically studied, and the partition coefficients between the micellar and water phases were evaluated in Triton X-100, Emulgen 120, and Brij 58 micellar systems. The micellar effects, i.e., a local increase in the dye concentration in the micelles, contribute to the formation of the dye-rich complexes. Formation constants of the beryllium-CAS complex are ..beta../sub 1/ = 10/sup 4.79/ and ..beta../sub 2/ = 10/sup 7.19/. At a low CAS concentration, the formation of Be(CAS)/sub 2/ is negligible in aqueous solutions. The molar absorptivities of the dye-rich complexes are about 4 times larger than those of the 1:1 complexes. The spectrophotometric determination of beryllium using the high molar absorptivities of these complexes was performed in the Triton X-100 micellar system.

• Research Organization: Yamaguchi Univ., Yoshida, Japan
• OSTI ID: 5698070
• Journal Information: Anal. Chem.; (United States), Journal Name: Anal. Chem.; (United States) Vol. 58:7; ISSN ANCHA
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400104* -- Spectral Procedures-- (-1987)
400201 -- Chemical & Physicochemical Properties
400301 -- Organic Chemistry-- Chemical & Physicochemical Properties-- (-1987)
ALKALINE EARTH METAL COMPLEXES
ALKALINE EARTH METALS
AQUEOUS SOLUTIONS
BERYLLIUM
BERYLLIUM COMPLEXES
CHEMICAL ANALYSIS
CHEMICAL PREPARATION
CHEMICAL REACTIONS
COMPLEXES
DATA
DISPERSIONS
DYES
ELEMENTS
EXPERIMENTAL DATA
INFORMATION
METALS
MICELLAR SYSTEMS
MIXTURES
NUMERICAL DATA
QUANTITATIVE CHEMICAL ANALYSIS
SOLUTIONS
SPECTROPHOTOMETRY
SURFACTANTS
SYNTHESIS
THERMODYNAMICS
TRIPHENYLMETHANE DYES