do Nascimento Rocha Sarah Adriana, Dantas Alaílson Falcão, Jaeger Helena Valli, Costa Antônio Celso Spínola, Leão Elsimar dos Santos, Gonçalves Mara Rúbia
Departamento de Química Analítica, Instituto de Química, Universidade Federal da Bahia, Campus Universitário Ondina, 40170290 Salvador, BA, Brazil.
Spectrochim Acta A Mol Biomol Spectrosc. 2008 Dec 15;71(4):1414-8. doi: 10.1016/j.saa.2008.04.013. Epub 2008 Apr 30.
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.
本文提出了一种用分子分光光度法测定甘蔗酒中铜含量的方法。铜（I）与联喹啉反应形成一种在545nm处有最大吸收的粉红色络合物。该反应在羟胺、乙醇和Triton X-100表面活性剂存在的情况下发生。铜的测定线性范围为0.2 - 20.0mgL⁻¹，检测限为0.05mgL⁻¹。所提出方法的一大优点是无需液 - 液萃取步骤，且无需使用像二氧六环这样的有毒有机溶剂来溶解试剂。
