Differences in stable isotope compositions δ2H and δ18O in water samples extracted from strawberries in Da Lat and Moc Chau

Abstract

Strawberry samples were collected from Dalat and Mocchau regions and extracted by a cryogenic vacuum method. Stable isotope compositions δ²H và δ¹⁸O in the extracted water were then analysed by a Liquid Water Isotope Analyzer (LWIA-24D). The evaluated results showed that, at the statistical significance level α=0.05, the δ²H and δ¹⁸O values obtained at Mocchau and Dalat samples are clearly different (p<0.001). In detail, the mean value of δ²H for strawberries grown in Mocchau (-42.83‰) was more enriched than that in Dalat (-53.99‰). In contrast, the value of δ¹⁸O for strawberries grown in Mocchau (-9.25‰) is more depleted than in Dalat (-5.67‰). In addition, the δ²H and δ¹⁸O values in each region are strongly correlated and can be distinguished based on the position of the correlation line relative to the global meteoric water line.