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Tyrosinase biosensor based on a glassy carbon electrode modified with multi-wal...
Vicentini, Fernando Campanhã; Janegitz, Bruno C.; Brett, Christopher M. A.; Fatibello-Filho, OrlandoA glassy carbon electrode modified with functionalized multi-walled carbon nanotubes (MWCNT), 1-butyl-3-methylimidazolium chloride (ionic liquid = IL) and tyrosinase (Tyr) within a dihexadecylphosphate (DHP) film for the development of a biosensor is proposed. MWCNT, IL and Tyr were efficiently immobilized in the film using 1-ethyl-3-(3-dimethylaminopropyl) carbodiimide/N-hydroxysuccinimide (EDC/NHS) as crossli...
Removal of copper(II) from sugar-cane spirits employing chitosan
Janegitz,Bruno C.; Oliveira,Andrea; Gomes,Marcos S.; Sartori,Elen R.; Pereira-Filho,Edenir R.; Fatibello-Filho,OrlandoA method employing chitosan as complexant agent in the removal of copper(II) ions generally present in the Brazilian cachaça samples is herein proposed. The efficiency of this method is attributed to its high capacity of metal cations adsorption, mainly due to presence of hydroxyl and amine groups that can serve as chelating sites. The removal of copper(II) ions from this alcoholic beverage was efficient employ...
Determinação de paracetamol pela inibição da reação quimiluminescente do lumino...
Oliveira,Geiser G.; Janegitz,Bruno C.; Batistão,Marina B.; Salami,Fernanda H.; Fatibello-Filho,Orlando; Leite,Oldair D.A flow injection chemiluminescence method for the determination of paracetamol in pharmaceutical formulations is described. It is based on the consumption of the sodium hypochlorite by paracetamol and decreases of the analytical signal. The analytical curve was linear in the paracetamol concentration range from 5.0 x 10-6 to 5.0 x 10-5 mol L-1, with a detection limit of 1.8 x 10-6 mol L-1. The RSDs were 2.0 and...
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