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Number of results

Journal

2010 | 8 | 2 | 258-263

Article title

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

Content

Title variants

Languages of publication

EN

Abstracts

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. [...]

Publisher

Journal

Year

Volume

8

Issue

2

Pages

258-263

Physical description

Dates

published
1 - 4 - 2010
online
23 - 3 - 2010

Contributors

author
  • Coloidal and Macromolecular Green Chemistry Group, Chemistry Department, Federal University of Viçosa, Viçosa/MG, 36570-000, Brazil
author
  • Coloidal and Macromolecular Green Chemistry Group, Chemistry Department, Federal University of Viçosa, Viçosa/MG, 36570-000, Brazil
author
  • Coloidal and Macromolecular Green Chemistry Group, Chemistry Department, Federal University of Viçosa, Viçosa/MG, 36570-000, Brazil
author
  • Coloidal and Macromolecular Green Chemistry Group, Chemistry Department, Federal University of Viçosa, Viçosa/MG, 36570-000, Brazil
author
  • Food Technology Department, Federal University of Viçosa, Viçosa/MG, 36570-000, Brazil
author
  • Food Technology Department, Federal University of Viçosa, Viçosa/MG, 36570-000, Brazil

References

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Document Type

Publication order reference

Identifiers

YADDA identifier

bwmeta1.element.-psjd-doi-10_2478_s11532-010-0008-0
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