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The Good the Bad and the Ugly,[object Object],The Impact of Off-flavours and Taints on Product Quality,[object Object],Dr Bill Simpson,[object Object],Cara Technology Limited,[object Object],www.cara-online.com,[object Object],Introduction to Flavours and their Applications,[object Object],Leatherhead Food Research 9 – 11 November 2010,[object Object]
Overview,[object Object],[object Object]
Consumer impact
Off-flavours
Taints
Prevention and controloverview,[object Object]
Definitions,[object Object],definitions,[object Object]
Not all off-flavours and taints are created equal,[object Object],definitions,[object Object]
Consumer impact,[object Object],“It’s different”,[object Object],“It’s not quite right”,[object Object],“I’m not sure I like this”,[object Object],“There’s something wrong here”,[object Object],“I’m worried”,[object Object],“Help!”,[object Object],Consumer impact,[object Object]
Ecomomicimpact,[object Object],2010,[object Object],One chemical,[object Object],consumer impact,[object Object],2-Methyl napthalene,[object Object],Contaminant from cereal packaging,[object Object],28 million boxes of cereal recalled,[object Object]
Flavour thresholds,[object Object],Positive flavours,[object Object],Off-flavours,[object Object],flavour thresholds,[object Object],Taints,[object Object],Log flavour threshold,[object Object]
Categories of off-flavours and taints,[object Object],Halophenols,[object Object],Sulphur compounds,[object Object],Aldehydes,[object Object],Peptides,[object Object],categories,[object Object],Haloanisoles,[object Object],Other phenolics,[object Object],Acids,[object Object],Heterocyclic compounds,[object Object],Esters,[object Object],Hydrocarbons,[object Object],Metals,[object Object],Bases,[object Object]
Origins of off-flavours,[object Object],origins,[object Object]
Off-flavours produced by microorganisms,[object Object],[object Object]
Butyric
Dimethyl sulphide
Hydrogen sulphide
Methanethiol
Dimethyl disulphide
Indole
Skatole
Isovaleric
Guaiacol
Styrene
Ethyl acetate
Acetaldehyde
‘Sour’
Acetic
‘Mousy’
‘Mushroom’
1,3-Pentadieneoff-flavours,[object Object]
Case study,[object Object],[object Object]
Traced to combination of diacetyl and butyric acid – confirmation by GC
The two flavours found to act synergistically to give a flavour intensity which belied their low concentration

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The Good The Bad And The Ugly The Impact Of Off Flavours And Taints On Product Quality