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Detection of boar taint Coen van Wagenberg Meeting 17-4-2013, Eindhoven, the Netherlands Develoment of an inline detection method for boar taint which is applicable in daily slaughterhouse practice, to prevent pork with boar taint reaching consumers

Detection of boar taint

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Detection of boar taint. Coen van Wagenberg. Meeting 17-4-2013, Eindhoven, the Netherlands Develoment of an inline detection method for boar taint which is applicable in daily slaughterhouse practice, to prevent pork with boar taint reaching consumers. What is boar taint ?. - PowerPoint PPT Presentation

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Page 1: Detection  of  boar taint

Detection of boar taint

Coen van Wagenberg

Meeting 17-4-2013, Eindhoven, the Netherlands

Develoment of an inline detection method for boar taint which is applicable in daily slaughterhouse practice, to prevent pork with boar taint reaching consumers

Page 2: Detection  of  boar taint

What is boar taint?

Smelling unpleasant odour which is released

from meat of boars if the meat is heated

Develops while reaching maturity

Chemical compounds

● Androstenone

● Skatole

● Indole

● p-cresole, 4-ethylphenole, 1,4-dichloorbenzeen, 4-phenyl-3-buten-2-one

● ???????

Page 3: Detection  of  boar taint

Human nose

Heating neck fat with gas burner

Line speed up to 650 boars/hour

Max half hour smelling continuously

1.5 million boars tested

Page 4: Detection  of  boar taint

Human nose

Score Description Decision

0 Normal pork smell No boar taint

1 Deviant smell, but not boar taint

2 Non aversive smell

3 Boar taint Boar taint

4 Strong boar taint

Page 5: Detection  of  boar taint

Human nose: deviant odour of boars

Average deviant odour 3-4% of boars

Spread between farms 0-10%

%afwijkende geur

aa

nta

l b

ed

rijv

en

verdeling berengeur (405 bedrijven)

0 0,02 0,04 0,06 0,08 0,1 0,12

0

20

40

60

80

405 farms with boars

Per cent deviant smell

Num

ber

of

farm

s

Page 6: Detection  of  boar taint

Consumer = golden standardBoar meat samples ranked on household overall quality perception and on boar

taint score with the human nose: is there a more accurate alternative?

Boar number

Page 7: Detection  of  boar taint

Agreement on ranking between overall quality perception consumers and order of ….

Kendall’s W P

Households: odour during backing loin .87 .001

Households: odour during backing chops .89 .000

Households: odour during backing belly .91 .000

Lab: androstenone .49 .510

Lab: skatole .58 .198

Panel: androstenone .58 .210

Panel: skatole .60 .153

Panel and Lab: androstenone .54 .337

Panel and Lab: skatole .61 .129

Kendall's coefficient can be used for assessing agreement among raters. Kendall's W ranges from 0 (no agreement) to 1 (complete agreement).

Page 8: Detection  of  boar taint

Agreement on ranking between overall quality perception consumers and order of ….

... Kendall’s W P

Panel: intensity taste .61 .128

Panel: tender .57 .212

Panel: fat .49 .522

Panel: juicy .54 .331

Panel: pork taste .50 .482

Inline human nose score .65 .065

Comparison currently available detection methods: HNS, lab analysis, trained panel • Humane Nose Score (HNS) results in highest agreement with score by the consumer• Agreement HNS with consumer higher than with laboratory analysis of androstenone and skatole• Agreement HNS with consumer slightly higher than with panel results for intensity taste

Page 9: Detection  of  boar taint

Effect fatigueness on human nose score

Score ranging from 0 = no smell to 4 = strong smell

Page 10: Detection  of  boar taint

Effect fatigueness on human nose score

Humane Nose Score Minutes 1-15 Minutes 16-30

0 80.30 80.77

1 8.96 8.52

2 6.70 6.70

3 3.40 3.38

4 0.65 0.63

Conclusion: within 30 minutes we do not observe fatigueness on humane nose