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J Mass Spectrom. 2016 Sep;51(9):684-9. doi: 10.1002/jms.3833.

Stable isotope composition of cocoa beans of different geographical origin.

Author information

1
Fondazione Edmund Mach, via E. Mach, 1, 38010 San Michele all'Adige, Italy. matteo.perini@fmach.it.
2
Fondazione Edmund Mach, via E. Mach, 1, 38010 San Michele all'Adige, Italy.
3
Dipartimento di Scienze degli Alimenti, Università di Parma, Parco Area delle Scienze 59A, 43124, Parma, Italy.

Abstract

The isotopic profile (δ(13) C, δ(15) N, δ(18) O, δ(2) H, δ(34) S) was used to characterise a wide selection of cocoa beans from different renowned production areas (Africa, Asia, Central and South America). The factors most influencing the isotopic signatures of cocoa beans were climate and altitude for δ(13) C and the isotopic composition of precipitation water for δ(18) O and δ(2) H, whereas δ(15) N and δ(34) S were primarily affected by geology and fertilisation practises. Multi-isotopic analysis was shown to be sufficiently effective in determining the geographical origin of cocoa beans, and combining it with Canonical Discriminant Analysis led to more than 80% of samples being correctly reclassified.

KEYWORDS:

IRMS; cocoa bean; geographical origin; stable isotope; traceability

PMID:
27484307
DOI:
10.1002/jms.3833
[Indexed for MEDLINE]

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