Journal Highlight: Volatile organic compounds associated with milk spoilage by psychrotrophic bacteria

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  • Published: Feb 12, 2018
  • Author: separationsNOW
  • Channels: Gas Chromatography
thumbnail image: Journal Highlight: Volatile organic compounds associated with milk spoilage by psychrotrophic bacteria

A total of 47 volatile organic compounds belonging to seven chemical groups were identified by GC/MS in spoiled milk that had been inoculated with five psychrotrophic bacterial strains.

Volatile organic compounds associated with milk spoilage by psychrotrophic bacteria

International Journal of Dairy Technology, 2018, online
Marilù Decimo, María C Cabeza, Juan A Ordóñez, Ivano De Noni and Milena Brasca

Abstract: The volatile organic compounds of milk contaminated with psychrotrophic bacteria were studied by HS-SPME and GC/MS. Pseudomonas fluorescens PS14, Pseudomonas fragi PS55, Pseudomonas mosselii PS39, Pseudomonas rhodesiae PS62 and Serratia marcescens S92 were inoculated in sterilised milk (2.5% fat) stored at either 5 °C or 10 °C. A total of 47 volatile organic compounds (VOCs) belonging to seven chemical groups were identified in the spoiled milk. Volatile organic compound patterns peculiar to the inoculate bacterial strains were highlighted. 3-Methylbutan-1-ol, 2 methylpropan-1-ol, 3-hydroxybutan-2-one, butan-2,3-dione, butanoic and hexanoic acids were revealed as potential chemical spoilage indexes of milk spoilage due to the activity of the five psychrotrophic strains studied.

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