Characterisation and geographical traceability of Italian goji berries
2019
Bertoldi, Daniela | Cossignani, Lina | Blasi, Francesca | Perini, Matteo | Barbero, Alice | Pianezze, Silvia | Montesano, Domenico
This work characterises and distinguishes Italian and Asian goji berries, combining three analytical approaches to determine 5 light stable isotope ratios, 57 mineral elements and 14 carotenoids.The study analyses stable isotope ratios and provides full HPLC-DAD-MS characterisation of the carotenoid fraction in goji berries for the first time. The isotopic composition of Italian berries was characterised by δ¹³C values ranging between −28.2‰ and −25.7‰, δ¹⁵N between 2.3 and 7.3‰, δ³⁴S between 2.6 and 7.9‰, and D/H between −112 and −49‰.Italian goji berries were shown to have a particular composition and interesting nutritional characteristics, specifically a higher total carotenoid content (355 mg/100 g dw mean content vs 198 mg/100 g dw) and higher content of some micronutrients: K, B, Cu, Mo, Se, and Zn.On the basis of δ³⁴S, Y, U, Cu, Rb, zeaxanthin palmitate and total carotenoid content, discriminant analysis correctly classified all samples according to their geographical origin.
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