Dummy molecularly imprinted polymers using dnp as a template molecule for explosive sensing and nitroaromatic compound discrimination
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 sy...
| Autores: | , , |
|---|---|
| Formato: | artículo |
| Fecha de publicación: | 2021 |
| País: | España |
| Recursos: | Universitat Autònoma de Barcelona |
| Repositorio: | Dipòsit Digital de Documents de la UAB |
| Idioma: | inglés |
| OAI Identifier: | oai:ddd.uab.cat:252018 |
| Acesso em linha: | https://ddd.uab.cat/record/252018 https://dx.doi.org/urn:doi:10.3390/chemosensors9090255 |
| Access Level: | acceso abierto |
| Palavra-chave: | Molecularly imprinted polymers Dummy template Voltammetric detection 2,4,6-trinitrotoluene Nitroaromatic compounds |
| Resumo: | 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 for DNP and 1.3 to 6.5 µmol L for TNT; the estimated limits of detection were 0.59 µmol L and 0.29 µmol L, 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. |
|---|