RT Journal Article
T1 Detection of Biological CO2 and 1,3-Pentadiene UsingNon-refrigerated Low-Cost MWIR Detectors
A1 Rivas, Eva María
A1 Maldonado, Maria
A1 Diezma, Belén
A1 Wrent, Petra
A1 Silóniz Jiménez, María Isabel de
A1 Vergara, Germán
A1 García-Hierro, Javier
A1 Robla Villalba, José Ignacio
A1 Barreiro, Pilar
AB The early detection of spoiling metabolic products in contaminated food is a very important tool to control quality. Some volatile compounds produce unpleasant odours at very low concentrations, making their early detection very challenging. This is the case of 1,3-pentadiene produced by microorganisms through decarboxylation of the preservative sorbate. In this work, we have developed a methodology to use the data produced by a low-cost, compact MWIR (MidWave IR) spectrometry device without moving parts, which is based on a linear array of 128 elements of VPD PbSe coupled to a linear variable filter (LVF) working in the spectral range between 3 and 4.6 μm. This device is able to analyze food headspace gases through dedicated sample presentation setup. This methodology enables the detection of CO2 and the volatile compound 1,3-pentadiene, as compared to synthetic patrons. Data analysis is based on an automated multidimensional dynamic processing of the MWIR spectra. Principal component and discriminant analysis allow segregating between four yeast strains including producers and no producers. The segregation power is accounted as a measure of the discrimination quality.
PB Springer
SN 1936-9751, ESSN: 1936-976X
YR 2016
FD 2016-06
LK https://hdl.handle.net/20.500.14352/23282
UL https://hdl.handle.net/20.500.14352/23282
LA eng
NO Universidad Complutense de Madrid y Banco de Santander
NO Moncloa Campus de Excelencia (UCM-UPM)
DS Docta Complutense
RD 14 dic 2025