Characterisation of volatile compounds produced by bacteria isolated from the spoilage flora of cold-smoked salmon

Type Article
Date 2001-06
Language English
Author(s) Joffraud Jean-Jacques, Leroi Francoise, Roy Caroline, Berdague J
Affiliation(s) IFREMER, Lab Genie Alimentaire, F-44311 Nantes 03, France.
INRA Theix, Rech Viande Stn, F-63122 St Genes Champanelle, France.
Source International Journal of Food Microbiology (0168-1605) (Elsevier), 2001-06 , Vol. 66 , N. 3 , P. 175-184
DOI 10.1016/S0168-1605(00)00532-8
WOS© Times Cited 118
Keyword(s) Volatile compounds, Bacteria, Spoilage, Cold smoked salmon
Abstract This study investigated the volatile compounds produced by bacteria belonging to nine different bacterial groups: Lactobacillus sake, L. farciminis, L. alimentarius. Carnobacterium piscicola, Aeromonas sp., Shewanella putefaciens. Brochothrix thermosphacta, Photobacterium phosphoreum and Enterobacteriaceae isolated from cold-smoked salmon. Each bacterial group was represented by several strains. In addition, combinations of the groups were examined as well. Sterile blocks of cold-smoked salmon were inoculated, vacuum-packed and stored at 6 degreesC. After 40 days of storage at 6 degreesC, aerobic viable count and pH were recorded, the volatile fraction of the samples was analysed by gas chromatography-mass spectrometry (GC-MS). and spoilage was assessed by sensory evaluation. Among the 81 volatile compounds identified by GC-MS, 30 appeared to be released as a result of bacterial metabolism Some of the effects of inoculated bacterial strains on the composition of the volatile fraction seemed to be characteristic of certain bacterial species. Sensory analysis showed relationships between bacteria, the composition of the volatile fraction and the organoleptic quality of smoked salmon.
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