Agradecimentos: The authors thank the financial support from Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES, Finance Code 001), CAPES-PrInt-UNESP (n° 41/2017 and n° 88887.583380/2020-00), Conselho Nacional de Desenvolvimento Cientifico e Tecnológico (CNPq), Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP, n° 2015/14836-9) and Instituto Nacional de Eletrônica Orgânica (INEO, FAPESP/CNPq/INCT n° 2014/50869-6). Additionally, we would like to thank the University of Ljubljana (Slovenia) for the Orange Data Mining free software Ver menos

Abstract: Two e-nose setups formed by similar sensing units based on nanofibers and drop-cast films of poly(vinylidene fluoride) (PVDF) were compared. In both setups, the sensing units were formed by pristine PVDF and PVDF modified with conducting polymers. The e-noses were tested in a custom-made chamber with volatile organic compounds (VOCs) and ammonia, using dry nitrogen as a flow gas. Overall, both e-nose devices discriminate against almost all vapors, especially ammonia. The results suggest that the e-nose based on nanofibers can distinguish ethanol from isopropanol, which is not possible with the e-nose based on drop-cast films of the same materials Ver menos