青海高原油菜蜜稳定同位素产地特征与环境响应机制研究

为探究青海油菜蜜稳定同位素特征及影响因素,本研究利用元素分析-稳定同位素比率质谱(EA-IRMS)建立了油菜蜜总δ13C值及其内源蛋白质δ13C、δ15N、δ2H、δ18O值的检测方法,分析了青海不同产地、不同年份油菜蜜及其内源蛋白质同位素特征差异,探讨了油菜蜜内源蛋白质稳定同位素与产地环境之间的关系.结果表明,青海省...

Stable Isotope Signatures of Rape Honey in Qinghai Province and Their Response Mechanisms to Environmental Factors

In order to explore the characteristics and influencing factors on stable isotopes of Qinghai rape honey, a detection method using elemental analysis-stability isotope ratio mass spectrometry (EA-IRMS) was established to obtain the total δ¹³C value of rape honey and its δ¹³C, δ¹⁵N, δ²H, δ¹⁸O values of endogenous proteins. The stable isotope variations of rape honey and its endogenous proteins were analyzed across different years and producing areas in Qinghai. The relationship between stable isotope of endogenous protein in rape honey endogenous protein and the origin environment was also discussed. The results showed that the δ¹³C and δ¹⁵N values of endogenous proteins in Qinghai rape honey were considerably stable, and there were no significant differences among different years and different origins. The δ¹⁸O values of inter-annual in endogenous proteins of rape honey samples were significantly different, as well as δ¹⁸O and δ²H values of endogenous proteins from different regions. For the environment factors, δ¹⁸O value in endogenous proteins of rape honey was negatively correlated with precipitation during the production season (r=-0.822). The results of this study provided theoretical basis and technical support for the authenticity identification and origin traceability of Qinghai rape honey.