Highly sensitive spectrophotometric determination of cobalt using o-hydroxyhydroquinonephthalein and hydrogen peroxide in the presence of mixed surfactants View Full Text


Ontology type: schema:ScholarlyArticle     


Article Info

DATE

1988-01

AUTHORS

I. Mori, Y. Fujita, K. Fujita, Y. Nakahashi, T. Tanaka, S. Ishihara

ABSTRACT

The effects of cobalt(II) and surfactants on the decomposition of various xanthene dyes by hydrogen peroxide have been systematically investigated. A simple and highly sensitive spectrophotometric determination of cobalt(II) (0.05 ∼ 1.2 Μg/10 ml) is proposed. The method is based on the catalytic effect of cobalt(II) on the oxidation of o-hydroxyhydroquinonephthalein (Qnph) by hydrogen peroxide. The proposed catalytic spectrophotometric determination was sensitive, selective, reproducible and virtually unaffected by the presence of other ions; the effective molar “desorptivity” was 4.2×108 l/mol per cm, Sandell sensitivity was 0.15 pg/cm2, and the relative standard deviation was 3.2% at 0.6 ng/10 ml (n=5). The selective assays of cobalt(II) in water samples were also investigated with satisfactory results (95% ∼ 101%). More... »

PAGES

619-623

Identifiers

URI

http://scigraph.springernature.com/pub.10.1007/bf00473779

DOI

http://dx.doi.org/10.1007/bf00473779

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1032704623


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