Polyelectrolyte coatings prevent interferences from charged nanoparticles in SPME speciation analysis

K. Zielinska, H.P. van Leeuwen

Research output: Contribution to journalArticleAcademicpeer-review

Abstract

In this work we present a new approach for protection of the fiber in solid phase microextraction (SPME) from interfering charged particles present in the sample medium. It involves coating of commercial poly(dimethylsiloxane) extraction phase with polyelectrolyte layer composed of poly(diallyldimethylammonium chloride), and poly(sodium 4-styrenesulfonate). The modified fiber provides reproducible, convenient and fast extraction capabilities toward the model analyte, triclosan (TCS). A negatively charged polyelectrolyte coating prevents sorbing oxidic nanoparticles from both partitioning into the PDMS phase and aggregation at its surface. The results for the TCS/nanoparticle sample show that the polyelectrolyte layer-modified solid phase extracts just the free form of the organic compound and enables dynamic speciation analysis of the nanoparticulate target analyte complex.
Original languageEnglish
Pages (from-to)44-47
Number of pages3
JournalAnalytica Chimica Acta
Volume844
DOIs
Publication statusPublished - 2014

Keywords

  • solid-phase microextraction
  • performance liquid-chromatography
  • surface modification
  • sample preparation
  • triclosan
  • fibers

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  • Projects

    BIOMONAR: Biosensor nanoarrays for environmental monitoring

    1/04/1031/03/14

    Project: EU research project

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