柚子原产地溯源鉴定技术

Tracing the Geographical Origin of Grapefruit

运用感官分析、化学成分分析和元素指纹分析作为评价手段,研究不同品种柚子的一般品质特性差异并对柚子原产地溯源技术的探究。结果表明,在方差分析中不同品种柚子的可食率、果实横径、VC含量、酸度、还原糖含量、黄酮含量、元素含量差异显著(P<0.05),其中可食率和VC含量能大致区分柚子产地,再进一步对元素进行主成分分析,其中钙、铁、钠、铬、镁、锌、锰元素能直观、显著地区分不同产地的柚子。此评价手段可作为柚子原产地溯源的基本方法,具有很高的可靠性和良好的应用前景。

The aims of this study were to develop a method to study the general quality characteristics of different varieties of grapefruit and to identify the geographical origin of grapefruit using sensory analysis, chemical analysis and elemental fingerprint analysis. The results indicated that there were significant differences in percent edibility, fruit diameter, acidity and the contents of vitamin C, reducing sugar and flavonoids among different varieties of grapefruit （P 〈 0.05）. The ratio of edible portion and vitamin C could be used to approximately predict the geographical origin of grapefruit. Element concentrations were determined and statistically analyzed using principal component analysis （PCA）. As a result, Ca, Fe, Na, Cr, Mg, Zn and Mn were able to be used to distinguish different origins of grapefruit. It can be concluded that analyses of the basic indicators in combination with elemental fingerprint analysis method can be used to successfully determine the geographical origin of grapefruit with high reliability and good prospect.