浙江省茶叶籽及油稳定同位素组成特征及影响因素研究OA

In order to investigate the elemental content and stable isotope characteristics of tea seeds and tea seed oil in Zhejiang Province,samples of tea fruits from two regions of Hangzhou and Ningbo and four varieties of tea fruits from the same production area were collected.Elemental analysis-stable isotope ratio mass spectrometry was used to analyze the elemental content of carbon and nitrogen(C％and N％)and the stable carbon,nitrogen,hydrogen,and oxygen isotope ratios(δ13C,δ15N,δ2H,and δ18O)in the tea seeds and tea seed oil,and to study the differences of the tea seeds and tea seed oil among the different regions and varieties.The δ15N values of tea seeds in Hangzhou and Ningbo-0.8‰ to 5.1‰ and 2.6‰ to 6.1‰,respectively.The 813C values of tea seed oil were-34.3‰ to-30.0‰ and-32.5‰ to-29.8‰,respectively.The δ15N value of tea seeds in Ningbo was significantly higher than that in Hangzhou,and the δ13C value of tea seed oil in Hangzhou was more negative.Varietal factors had a significant effect on the δ15N value of tea seeds and a lesser effect on the δ13C,82H and 618O values of tea seeds and tea seed oil.Overall,the elemental compositions in tea seeds and tea seed oil were more influenced by the origin.This study provides a theoretical basis for the establishment and characterization of the elemental content and stable isotope database of tea seeds and tea seed oil.