Spectrochimica acta part a-molecular and biomolecular spectroscopy
| Autor: | Rocha, Sarah Adriana do Nascimento, Dantas, Alailson Falcão, Jaeger, Helena Valli, Costa, Antonio Celso Spinola, Leão, Elsimar dos Santos, Gonçalves, Mara Rúbia |
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| Jazyk: | angličtina |
| Rok vydání: | 2008 |
| Předmět: | |
| Zdroj: | Repositório Institucional da UFBA Universidade Federal da Bahia (UFBA) instacron:UFBA |
| ISSN: | 1414-1418 |
| DOI: | 10.1016/j.saa.2008.04.013 |
| Popis: | Acesso restrito: Texto completo. p. 1414-1418 Submitted by JURANDI DE SOUZA SILVA (jssufba@hotmail.com) on 2012-05-21T19:57:28Z No. of bitstreams: 1 __ac.els-cdn.com_S138614...1c05e0691f4248bfd06af31433101.pdf: 149980 bytes, checksum: de50f7f732621e9b1ec9ad7d70ed5490 (MD5) Made available in DSpace on 2012-05-21T19:57:28Z (GMT). No. of bitstreams: 1 __ac.els-cdn.com_S138614...1c05e0691f4248bfd06af31433101.pdf: 149980 bytes, checksum: de50f7f732621e9b1ec9ad7d70ed5490 (MD5) Previous issue date: 2008 The present paper proposes amethod 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 0.2–20.0mgL−1 with a detection limit 0.05mgL−1. The great advantages of the proposed methodology are the elimination of liquid–liquid extraction step vand the use of toxic organics solvents, like dioxane, to dissolve the reagent. |
| Databáze: | OpenAIRE |
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