RT info:eu-repo/semantics/article
T1 Analysis of milk using a portable potentiometric electronic tongue based on five polymeric membrane sensors
A1 Pérez González, Clara
A1 Salvo Comino, Coral
A1 Martín Pedrosa, Fernando
A1 Guimarães Dias, Luís
A1 Rodríguez Pérez, Miguel Ángel
A1 García Cabezón, Ana Cristina
A1 Rodríguez Méndez, María Luz
K1 Potentiometric electronic tongue
K1 Milk
K1 Dairy
K1 Fat content
K1 Lactose
K1 22 Física
K1 23 Química
AB A portable potentiometric electronic tongue (PE-tongue) was developed and applied toevaluate the quality of milk with different fat content (skimmed, semi-skimmed, and whole)and with different nutritional content (classic, calcium-enriched, lactose-free, folicacid–enriched, and enriched in sterols of vegetal origin). The system consisted of asimplified array of five sensors based on PVC membranes, coupled to a data logger.The five sensors were selected from a larger set of 20 sensors by applying the geneticalgorithm (GA) to the responses to compounds usually found in milk including salts (KCl,CaCl2, and NaCl), sugars (lactose, glucose, and galactose), and organic acids (citric acidand lactic acid). Principal component analysis (PCA) and support vector machine (SVM)results indicated that the PE-tongue consisting of a five-electrode array could successfullydiscriminate and classify milk samples according to their nutritional content. The PEtongueprovided similar discrimination capability to that of a more complex system formedby a 20-sensor array. SVM regression models were used to predict the physicochemicalparameters classically used in milk quality control (acidity, density, %proteins, %lactose,and %fat). The prediction results were excellent and similar to those obtained with a muchmore complex array consisting of 20 sensors. Moreover, the SVM method confirmed thatspoilage of unsealed milk could be correctly identified with the simplified system and theincrease in acidity could be accurately predicted. The results obtained demonstrate thepossibility of using the simplified PE-tongue to predict milk quality and provide informationon the chemical composition of milk using a simple and portable system.
PB Frontiers Media
SN 2296-2646
YR 2021
FD 2021
LK https://uvadoc.uva.es/handle/10324/49160
UL https://uvadoc.uva.es/handle/10324/49160
LA eng
NO Frontiers in Chemistry, 2021, vol. 9
NO Producción Científica
DS UVaDOC
RD 19-abr-2024