Spectrofotometric determination of copper in sugar cane spirit using biquinoline in the presence of ethanol and Triton X-100.
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.
do Nascimento Rocha
Sarah Adriana
SA
Departamento de Química Analítica, Instituto de Química, Universidade Federal da Bahia, Campus Universitário Ondina, 40170290 Salvador, BA, Brazil. pgquim@ufba.br
Dantas
Alaílson Falcão
AF
Jaeger
Helena Valli
HV
Costa
Antônio Celso Spínola
AC
Leão
Elsimar dos Santos
Edos S
Gonçalves
Mara Rúbia
MR
D000438:Alcohols / Q000737:chemistry; D003300:Copper / Q000737:chemistry*; D003902:Detergents / Q000494:pharmacology*; D004146:Dioxanes / Q000737:chemistry; D000431:Ethanol / Q000032:analysis / Q000737:chemistry / Q000494:pharmacology*; D006863:Hydrogen-Ion Concentration; D019811:Hydroxylamine / Q000737:chemistry; D008956:Models, Chemical; D017830:Octoxynol / Q000494:pharmacology*; D009930:Organic Chemicals / Q000737:chemistry; D011804:Quinolines / Q000737:chemistry*; D031786:Saccharum / Q000378:metabolism*; D012997:Solvents / Q000737:chemistry; D013053:Spectrophotometry / Q000379:methods*; D013056:Spectrophotometry, Ultraviolet / Q000379:methods*
D000438:Alcohols; D003902:Detergents; D004146:Dioxanes; D009930:Organic Chemicals; D011804:Quinolines; D012997:Solvents; D019811:Hydroxylamine; D000431:Ethanol; D003300:Copper; D017830:Octoxynol; C025223:1,4-dioxane