Boar taint - analytical alternatives
1994
Hansen-Moeller, J. | Andersen, J.R. (Daenisches Forschungsinstitut fuer Fleischwirtschaft, Roskilde (Denmark))
Entire male pig production has gained considerably in interest during recent years. As a small percentage of tainted carcasses is observed, a prerequisite for a successful production is removal of these. Consequently several procedures for determination of boar taint were reported. In the present paper different analytical procedures are compared. In general they give identical results on identical samples, i.e. they are not plagued by systematical errors. The Danish colourimetric method yielding "skatole equivalents" shows a high correlation (0,975) to results obtained for skatole with a HPLC procedure. An even higher correlation (r = 0,986) is obtained by including both skatole and indole in the comparison, i.e. "skatole equivalents" have contributions from both compounds. Concerning androstenone analysis general consensus between the alternative procedures, comprising HPLC, GC-MS, RIA and ELISA methods, also exists. The relationship between skatole/androstenone and smell mainly confirmed the previous results. That is, 58% of the variation in odour/flavour could be explained by the "skatole equivalents". By including androstenone the explanation of the variation increased to about 66%. Androstenone alone explained only about 24%. The occurrence of falsely accepted pigs that have a deviating smell although accepted from an analytical point of view, was investigated using a trained taste panel. If either 0,25 ppm skatole equivalents or alternatively 0,5 ppm androstenone is used as threshold limit, the present study on Danish pigs shows that 1,2% of the approved male carcasses will have a deviating smell in both cases. However, androstenone analysis will sort out 48% of all males, whereas "skatole equivalents" "only" removes 4,3%. (The En version of this paper is published on pp. 963-966 of this issue of FLEISCHWIRTSCHAFT).
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