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

Research output: Contribution to journalArticle


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.


Research areas and keywords

Subject classification (UKÄ) – MANDATORY

  • Analytical Chemistry


  • water samples, MMLLE, dinitrophenols, HPLC-DAD
Original languageEnglish
Pages (from-to)2144-2152
JournalJournal of Separation Science
Issue number13
Publication statusPublished - 2007
Publication categoryResearch

Bibliographic note

The information about affiliations in this record was updated in December 2015. The record was previously connected to the following departments: Analytical Chemistry (S/LTH) (011001004)