基于稳定同位素和元素技术的草莓产地溯源

Traceability of Fragariaananassa Duch. origin based on stable isotope and elemental technology

中文关键词:  稳定同位素  元素  产地溯源  草莓

英文关键词:stable isotopes  elements  origin tracing  Fragariaananassa Duch.

中文摘要:

      目的 研究利用草莓中稳定同位素和多种元素地域特征进行产地准确溯源的可行性。方法 应用稳定同位素比质谱技术和电感耦合等离子体质谱法, 测试草莓样品中碳(13C/12C)、氮(15N/14N)、氢(2H/1H)、氧(18O/16O) 4种稳定同位素比值和18种元素含量, 分析不同产地草莓的特征指标, 采用逐步判别分析, 分别建立稳定同位素、矿物元素、稳定同位素和矿物元素结合3种产地判别模型, 开展昌平、双流和丹东草莓产地溯源。结果 3种模型交叉检验的正确判别率分别为88.4%、90.7%和100.0%。结论 采用单一技术进行设施草莓产地溯源判别准确率并不理想, 而同时利用稳定同位素和元素技术进行溯源, 能够对产地进行精准区分, 为设施种植产品产地溯源的可行性提供方法依据。

英文摘要:

      Objective To study investigates the feasibility of accurately tracing the origin of Fragariaananassa Duch. using stable isotopes and regional characteristics of multiple elements. Methods Using stable isotope ratio mass spectrometry technology and inductively coupled plasma mass spectrometry, the stable isotope ratios of carbon (13C/12C), nitrogen (15N/14N), hydrogen (2H/1H), and oxygen (18O/16O) and the content of 18 kinds of elements in Fragariaananassa Duch. samples was tested. The characteristic indicators of Fragariaananassa Duch. from different origins were analyzed, and stepwise discriminant analysis was used to establish 3 kinds of origin discrimination models for stable isotopes, mineral elements, and stable isotopes and mineral elements. The traceability of Fragariaananassa Duch. origins in Changping, Shuangliu, and Dandong was carried out. Results The correct discrimination rates of cross testing of 3 kinds of models were 88.4%, 90.7%, and 100.0%, respectively. Conclusion Research has shown that using a single technology for facility Fragariaananassa Duch. origin tracing and identification is not ideal, while simultaneously using stable isotope and elemental technologies for tracing can accurately distinguish the origin and provide a methodological basis for the feasibility of facility grown product origin tracing.