A new carbon-based magnetic material for the dispersive solid-phase extraction of UV filters from water samples before liquid chromatography–tandem mass spectrometry analysis

Research output: Contribution to journalJournal articleResearchpeer-review

  • Susy Piovesana
  • Anna Laura Capriotti
  • Chiara Cavaliere
  • La Barbera, Giorgia
  • Roberto Samperi
  • Riccardo Zenezini Chiozzi
  • Aldo Laganà

Magnetic solid-phase extraction is one of the most promising new extraction methods for liquid samples before ultra-high-performance liquid chromatography–tandem mass spectrometry (UHPLC–MS/MS) analysis. Several types of materials, including carbonaceous ones, have been prepared for this purpose. In this paper, for the first time, the preparation, characterization, and sorption capability of Fe3O4-graphitized carbon black (mGCB) composite toward some compounds of environmental interest were investigated. The synthesized mGCB consisted of micrometric GCB particles with 55 m2 g−1 surface area bearing some carbonyl and hydroxyl functionalities and the surface partially decorated by Fe3O4 microparticles. The prepared mGCB was firstly tested as an adsorbent for the extraction from surface water of 50 pollutants, including estrogens, perfluoroalkyl compounds, UV filters, and quinolones. The material showed good affinity to many of the tested compounds, except carboxylates and glucoronates; however, some compounds were difficult to desorb. Ten UV filters belonging to the chemical classes of benzophenones and p-aminobenzoates were selected, and parameters were optimized for the extraction of these compounds from surface water before UHPLC–MS/MS determination. Then, the method was validated in terms of linearity, trueness, intra-laboratory precision, and detection and quantification limits. In summary, the method performance (trueness, expressed as analytical recovery, 85–114%; RSD 5–15%) appears suitable for the determination of the selected compounds at the level of 10–100 ng L−1, with detection limits in the range of 1–5 ng L−1. Finally, the new method was compared with a published one, based on conventional solid-phase extraction with GCB, showing similar performance in real sample analysis. [Figure not available: see fulltext.].

Original languageEnglish
JournalAnalytical and Bioanalytical Chemistry
Volume409
Issue number17
Pages (from-to)4181-4194
Number of pages14
ISSN1618-2642
DOIs
Publication statusPublished - 1 Jul 2017

    Research areas

  • LC–MS/MS, Magnetic graphitized carbon black, Magnetic solid-phase extraction, UV filters, Water samples

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