Dummy Molecularly Imprinted Polymers Using DNP as a Template Molecule for Explosive Sensing and Nitroaromatic Compound Discrimination

Anna Herrera-Chacon, Andreu Gonzalez-Calabuig, Manel del Valle

Research output: Contribution to journalArticleResearchpeer-review

5 Citations (Scopus)
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Abstract

This work reports a rapid, simple and low-cost voltammetric sensor based on a dummy molecularly imprinted polymer (MIP) that uses 2,4-dinitrophenol (DNP) as a template for the quantification of 2,4,6-trinitrotoluene (TNT) and DNP, and the identification of related substances. Once the polymer was synthesised by thermal precipitation polymerisation, it was integrated onto a graphite epoxy composite (GEC) electrode via sol–gel immobilisation. Scanning electron microscopy (SEM) was performed in order to characterise the polymer and the sensor surface. Responses towards DNP and TNT were evaluated, displaying a linear response range of 1.5 to 8.0 µmol L −1 for DNP and 1.3 to 6.5 µmol L −1 for TNT; the estimated limits of detection were 0.59 µmol L −1 and 0.29 µmol L −1, for DNP and TNT, respectively. Chemometric tools, in particular principal component analysis (PCA), demonstrated the possibilities of the MIP-modified electrodes in nitroaromatic and potential interfering species discrimination with multiple potential applications in the environmental field.

Original languageEnglish
Article number255
JournalChemosensors
Volume9
Issue number9
DOIs
Publication statusPublished - 8 Sep 2021

Keywords

  • 2,4,6-trinitrotoluene
  • Dummy template
  • Molecularly imprinted polymers
  • Nitroaromatic compounds
  • Voltammetric detection

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