Autoria: LVOVA, L.; JAHATSPANIAN, I.; MATTOSO, L. H. C.; CORREA, D. S.; OLENEVA, E.; LEGIN, A.; DI NATALE, C.; PAOLESSE, R.

Resumo: A potentiometric E-tongue system based on low-selective polymeric membrane and chalcogenide-glass electrodes is employed to monitor the taste-and-odor-causing pollutants, geosmin (GE) and 2-methyl-isoborneol (MIB), in drinkable water. The developed approach may permit a low-cost monitoring of these compounds in concentrations near the odor threshold concentrations (OTCs) of 20 ng/L. The experiments demonstrate the success of the E-tongue in combination with partial least squares (PLS) regression technique for the GE/MIB concentration prediction, showing also the possibility to discriminate tap water samples containing these compounds at two concentration levels: the same OTC order from 20 to 100 ng/L and at higher concentrations from 0.25 to 10 mg/L by means of PLS-discriminant analysis (DA) method. Based on the results, developed multisensory system can be considered a promising easy-to-handle tool for express evaluation of GE/MIB species and to provide a timely detection of alarm situations in case of extreme pollution before the drinkable water is delivered to end users.

Ano de publicação: 2020

Tipo de publicação: Artigo de periódico

Unidade: Embrapa Instrumentação

Palavras-chave: 2-methyl-isoborneol, Pontentiometric E-tongue, Taste-and-odor-causing compounds, Water potability assessment