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2010 | 8 | 2 | 258-263
Tytuł artykułu

Application of a macromolecular micellar system formed by the P123 triblock copolymer for determination of copper concentrations

Treść / Zawartość
Warianty tytułu
Języki publikacji
EN
Abstrakty
EN
This work proposes a method for determination Cu(II) concentrations, based on the formation of a copper-1-nitroso-2-naphthol complex, in the presence of micelles; formed by a triblock copolymer, made up of two blocks of polyethylene oxide (PEO), and one block of polypropylene oxide (PPO). The insoluble copper complexes, are concentrated inside the hydrophobic micelle core; formed by the PPO block. For a solution containing 0.200 mg L−1 Cu(II), the proposed method had a relative standard deviation of 2.0% (n = 3); an absolute error from 0.11 to 0.39 mg L−1; and a linear calibration range, from 0.200 to 0.800 mg L−1. Detection and quantification limits, were 43.1 mg L−1 and 144 mg L−1, respectively. We show that there is excellent agreement, between the results obtained using our novel method; and those obtained using flame atomic absorption spectrometry: In the determination of Cu(II) concentrations, in Brazilian sugar-cane spirits. The proposed method, is the first to apply macromolecular micelle systems, to the determination of copper concentrations; and improves upon the results obtained using molecular surfactants. This method is environmentally friendly (since it does not use any organic solvents for extraction), and the triblock copolymer is biodegradable and non-toxic. [...]
Wydawca

Czasopismo
Rocznik
Tom
8
Numer
2
Strony
258-263
Opis fizyczny
Daty
wydano
2010-04-01
online
2010-03-23
Twórcy
  • Coloidal and Macromolecular Green Chemistry Group, Chemistry Department, Federal University of Viçosa, Viçosa/MG, 36570-000, Brazil
autor
  • Coloidal and Macromolecular Green Chemistry Group, Chemistry Department, Federal University of Viçosa, Viçosa/MG, 36570-000, Brazil
autor
  • Coloidal and Macromolecular Green Chemistry Group, Chemistry Department, Federal University of Viçosa, Viçosa/MG, 36570-000, Brazil, mariacarmo@ufv.br
autor
  • Coloidal and Macromolecular Green Chemistry Group, Chemistry Department, Federal University of Viçosa, Viçosa/MG, 36570-000, Brazil
autor
  • Food Technology Department, Federal University of Viçosa, Viçosa/MG, 36570-000, Brazil
autor
  • Food Technology Department, Federal University of Viçosa, Viçosa/MG, 36570-000, Brazil
Bibliografia
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Typ dokumentu
Bibliografia
Identyfikatory
Identyfikator YADDA
bwmeta1.element.-psjd-doi-10_2478_s11532-010-0008-0
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