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Determination of trace levels of dinitrophenolic compounds by microporous membrane liquid-liquid extraction in environmental water samples

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Author

Summary, in English

A fast and simple hollow fibre-based microporous membrane liquid-liquid extraction (MMLLE) method is proposed for the determination of trace levels of dinitrophenolic compounds in water samples. The optimization step was performed using a three-variables Doehlert matrix design, involving the fibre length, the quantity of trioctylphosphine oxide (TOPO) in the acceptor phase and the extraction time. Using the established experimental conditions, some other parameters such as stirring speed, salt content, humic acids and different organic solvents as the acceptor phase were studied. Validation of the method included calibration experiments, linearity studies and determination of method LOD (MLD). The RSD was around 11% in all the experiments on different days at different concentrations. Separation and detection of four dinitrophenols were performed in 10 min with an RP-LC and a C-8 column ACN-citric buffer gradient elution and diode array detection.

Publishing year

2007

Language

English

Pages

2144-2152

Publication/Series

Journal of Separation Science

Volume

30

Issue

13

Document type

Journal article

Publisher

John Wiley & Sons Inc.

Topic

  • Analytical Chemistry

Keywords

  • water samples
  • MMLLE
  • dinitrophenols
  • HPLC-DAD

Status

Published

ISBN/ISSN/Other

  • ISSN: 1615-9314