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Title: Geographical origin of imported and domestic teas (Camellia sinensis) from Turkey as determined by stable isotope signatures
Authors: Cengiz, Mehmet Fatih
Turan, Önder
Özdemir, Durmuş
Albayrak, Yalçın
Perinçek, Fatih
Kocabaş, Halil
Keywords: Geographical origin
Isotope ratio
Multivariate statistical analysis
Camellia sinensis
Black Sea regions
Turkish tea
Issue Date: Dec-2017
Publisher: Taylor and Francis Ltd.
Source: Cengiz, M. F., Turan, Ö., Özdemir, D., Albayrak, Y., Perinçek, F., and Kocabaş, H. (2017). Geographical origin of imported and domestic teas (Camellia sinensis) from Turkey as determined by stable isotope signatures. International Journal of Food Properties, 20(12), 3234-3243. doi:10.1080/10942912.2017.1283327
Abstract: In this study, stable isotope signatures (δ13C, δ15N, and δD) of both tea leaves and tea infusions were investigated to identify the geographical origin of Turkish domestic and imported tea samples. Sixteen domestic tea samples collected from different locations in the Black Sea Region, which produces almost 100% of tea in Turkey, and 11 imported tea samples (Kenya, India, Sri Lanka, Indonesia, and China) purchased from importers were studied. δ13C, δ15N, and δD in the samples were determined using isotope ratio mass spectrometry (IR-MS). δ13C in the samples ranged from −29.18 ± 0.01 to −25.7 ± 0.2, while δ15N ranged between 1.1 ± 0.2 and 5.2 ± 0.8. However, δD in the samples were found to be in the range from 56.5 ± 0.3 to 72 ± 1. The classifications of the tea samples into domestic and imported tea samples were achieved with 100% accuracy using multivariate statistical analyses (principal component analysis, PCA, and hierarchical cluster analysis, HCA). In conclusion, the domestic tea samples had a distinctive isotopic fingerprint and the isotopic ratios used in the study can be significant predictors in determination of the geographical source of Turkish tea.
ISSN: 1094-2912
Appears in Collections:Chemistry / Kimya
Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection
WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collection

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