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  • Title: Spectrofotometric determination of copper in sugar cane spirit using biquinoline in the presence of ethanol and Triton X-100.
    Author: do Nascimento Rocha SA, Dantas AF, Jaeger HV, Costa AC, Leão Edos S, Gonçalves MR.
    Journal: Spectrochim Acta A Mol Biomol Spectrosc; 2008 Dec 15; 71(4):1414-8. PubMed ID: 18595772.
    Abstract:
    The present paper proposes a method for molecular spectrophotometric determination of copper in sugar cane spirits. The copper(I) reacts with biquinoline forming a pink complex with maximum absorption at 545 nm. The reaction occurs in the presence of hydroxylamine, ethanol and Triton X-100 tensioative. Determination of copper is possible in a linear range 0.2-20.0 mgL(-1) with a detection limit 0.05 mgL(-1). The great advantages of the proposed methodology are the elimination of liquid-liquid extraction step and the use of toxic organics solvents, like dioxane, to dissolve the reagent.
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