Portable Electronic Nose for Detection of Spoiling Alaska Pink Salmon (Oncorhynchus gorbuscha)

• Autores: J. Chantarachoti, A.C.M. Oliveria, Brian Himelbloom, Charles A. Crapo, D.G. McLachlan
• Localización: Journal of food science, ISSN 0022-1147, Vol. 71, Nº 5, 2006
• Idioma: inglés
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• Resumen

  • The ability of a portable hand-held electronic nose (EN) in detecting spoilage of whole Alaska pink salmon (Oncorhynchus gorbuscha) stored at 14 °C and in slush ice (1 °C) was investigated. Fish were sampled daily at 14 °C for up to 3 d, while fish stored in slush ice were sampled at various intervals up to 16 d. Sensory evaluations indicated that fish were rejected at day 3 when stored at 14 °C and at day 12 when stored in slush ice. Aerobic bacteria counts for fish skin at 14 °C ranged from 3.4 log10 colony-forming units (CFU)/cm2 (day 0) to 4.8 log10 CFU/cm2 (day 3) and for fish stored in slush ice ranged from 3.4 log10 CFU/cm2 (day 0) to 5.5 log10 CFU/cm2 (day 16). The correct classification rate using forward stepwise general discriminate analysis was 85% and 92% for EN analysis of belly cavity volatiles for fish held at 14 °C and in slush ice, respectively. A predictive model may be developed for spoilage of whole Alaska pink salmon by analyzing belly cavity odors using the EN.