Institute of Food Chemistry (170b), University of Hohenheim, Garbenstraße 28, D-70599 Stuttgart, Germany.
J Agric Food Chem. 2020 Dec 9;68(49):14386-14392. doi: 10.1021/acs.jafc.0c01051. Epub 2020 May 19.
Truffles ( spp.) are considered the most expensive edible fungi and, therefore, are highly prone to food fraud. In this study, authentic truffles from different countries of origin and species were characterized by the determination of their stable carbon, nitrogen, and hydrogen isotope ratios (bulk δH, δC, and δN values). Chinese truffles from Yunnan or related provinces ( = 19) could be well-separated from all European samples (eight countries; = 105) by means of their significantly ( < 0.05) more negative δH values. Furthermore, samples of the second most expensive European species were both more enriched in N and more depleted in C compared to the remaining samples, which allowed for an unequivocal differentiation. Hence, stable isotope ratio analysis could be of high value in terms of authentication of truffles.
块菌（ spp.）被认为是最昂贵的食用真菌，因此极易发生食品欺诈。在这项研究中，通过测定其稳定的碳、氮和氢同位素比值（总 δH、δC 和 δN 值），对来自不同原产国和物种的正宗块菌进行了特征描述。云南或相关省份的中国块菌（ = 19）与所有欧洲样本（八个国家； = 105）可以通过其显著更负的 δH 值（<0.05）来很好地分离。此外，与其余样本相比，第二种最昂贵的欧洲物种的样本中氮的含量更高，而碳的含量更低，这使得可以进行明确的区分。因此，稳定同位素比分析在块菌的鉴定方面具有很高的价值。
