USP Electronic Research Repository

A fluorescence quenching-based sensor using new metallo-tetraazaporphyrin dye as a recognition element for aniline assay in aqueous solutions

Prasad, Rajendra and Kumar, Rajeev and Prasad, Surendra (2009) A fluorescence quenching-based sensor using new metallo-tetraazaporphyrin dye as a recognition element for aniline assay in aqueous solutions. Analytica Chimica Acta, 646 (1-2). pp. 97-103. ISSN 0003-2670

Full text not available from this repository.

Abstract

Determination of aniline using metallo-tetraazaporphyrin dyes in CH2Cl2 solutions is described. Seven newly synthesized dyes were screened for the purpose. It was found that fluorescence emission between 700 and 800 nm of the new metal complex dye, octakis(methylthio)tetraazaporphyrinzinc(II) at λmax 505 nm excitation was effectively quenched by the presence of aniline at submicromolar concentrations. The magnitude of quenching depended linearly upon the concentration of aniline in the investigated concentration range of 5.32 × 10−7 to 2.66 × 10−6 M. Therefore it was used in the determination of aniline in the CH2Cl2 extracts from the spiked aqueous solutions. Interference by the other metal ions at 10 and 100 fold higher concentrations in the aqueous solutions was also investigated. The reported method is highly sensitive and showed very low detection limit of 9.87 × 10−8 M in CH2Cl2solution that corresponded to 1.06 × 10−7 M aniline in water samples containing micromolar amounts of interfering metal ions. Despite of the simplicity of the method it gave highly reproducible results.

Item Type: Journal Article
Subjects: Q Science > QD Chemistry
Divisions: Faculty of Science, Technology and Environment (FSTE) > School of Biological and Chemical Sciences
Depositing User: Ms Neha Harakh
Date Deposited: 25 Nov 2009 08:20
Last Modified: 09 Feb 2012 11:17
URI: http://repository.usp.ac.fj/id/eprint/1488
UNSPECIFIED

Actions (login required)

View Item