title: Development of a colorimetric sensor array for squid spoilage assessment.
abstract: The aim of this work was to develop and evaluate a rapid, easy-to-use optoelectronic system for the shelf-life assessment of squid in cold storage. For this purpose, an optoelectronic nose was designed, which consisted of an array containing six sensing materials prepared by combining different dyes and two inorganic supports (aluminium oxide and silica gel). Samples were packaged with the colorimetric array and kept in cold storage for 12 days. Squid spoilage was monitored simultaneously by the colorimetric array and by the physico-chemical and microbial analyses during storage. Samples exceeded the acceptability limits for microbial counts on the third day. PCA analysis carried out with CIELab showed that the colorimetric array was able to discriminate between fresh squid fit for consumption and spoiled squid. The statistical models obtained by PLS, with the optoelectronic nose, successfully predicted CO2 and O2 content in the headspace as well as microbial growth.
authors.affiliation: Centro de Reconocimiento Molecular y Desarrollo Tecnológico, Unidad Mixta Universitat Politècnica de València-Universitat de València, Camino de Vera s/n, 46022 Valencia, Spain.
authors.forename: Patricia
authors.initials: P
authors.lastname: Zaragozá
authors.affiliation: Departamento de Tecnología de Alimentos, Universitat Politècnica de València, Camino de Vera s/n, 46022 Valencia, Spain.
authors.forename: Ana
authors.initials: A
authors.lastname: Fuentes
authors.affiliation: Departamento de Tecnología de Alimentos, Universitat Politècnica de València, Camino de Vera s/n, 46022 Valencia, Spain.
authors.forename: María
authors.initials: M
authors.lastname: Ruiz-Rico
authors.affiliation: Centro de Reconocimiento Molecular y Desarrollo Tecnológico, Unidad Mixta Universitat Politècnica de València-Universitat de València, Camino de Vera s/n, 46022 Valencia, Spain; CIBER de Bioingeniería, Biomateriales y Nanomedicina (CIBER-BBN), Spain.
authors.forename: José-Luis
authors.initials: JL
authors.lastname: Vivancos
authors.affiliation: Departamento de Tecnología de Alimentos, Universitat Politècnica de València, Camino de Vera s/n, 46022 Valencia, Spain. Electronic address: isferse1@tal.upv.es.
authors.forename: Isabel
authors.initials: I
authors.lastname: Fernández-Segovia
authors.affiliation: Centro de Reconocimiento Molecular y Desarrollo Tecnológico, Unidad Mixta Universitat Politècnica de València-Universitat de València, Camino de Vera s/n, 46022 Valencia, Spain.
authors.forename: José V
authors.initials: JV
authors.lastname: Ros-Lis
authors.affiliation: Departamento de Tecnología de Alimentos, Universitat Politècnica de València, Camino de Vera s/n, 46022 Valencia, Spain.
authors.forename: José M
authors.initials: JM
authors.lastname: Barat
authors.affiliation: Centro de Reconocimiento Molecular y Desarrollo Tecnológico, Unidad Mixta Universitat Politècnica de València-Universitat de València, Camino de Vera s/n, 46022 Valencia, Spain; CIBER de Bioingeniería, Biomateriales y Nanomedicina (CIBER-BBN), Spain.
authors.forename: Ramón
authors.initials: R
authors.lastname: Martínez-Máñez
mesh_terms: D000818:Animals; D015374:Biosensing Techniques / Q000379:methods*; D015169:Colony Count, Microbial; D003124:Colorimetry / Q000379:methods*; D049832:Decapodiformes / Q000737:chemistry* / Q000382:microbiology; D005504:Food Analysis / Q000379:methods; D005511:Food Handling; D005519:Food Preservation
keywords: Colorimetric array; Optoelectronic nose; Spoilage; Squid