采用微波消解-ICP-AES法对不同产地果用银杏叶无机元素分析与评价

Evaluation and Analysis of Inorganic Elements in Ginkgo Biloba Leaves by Microwave Digestion-ICP-AES

采用微波消解-ICP-AES法探索不同产地果用银杏采果后叶中无机元素含量,用主成分分析法对其所含元素进行分析和评价。结果表明,不同产地果用银杏叶含有22～26种无机元素,其中Fe,Zn,Cu,Mn,Cr,Co,Ni,Sr,B,Si和Ni等11种为人体必需微量元素,Ca,P,K,Na和Mg等五种为人体必需宏量元素;主成分分析选择了7个因子,并对果用银杏叶进行了综合评价,其综合评价函数为F=0.230 17F1+0.122 39F2+0.079 67F3+0.078 97F4+0.065 25F5+0.062 03F6+0.056 71F7,结果发现江苏泰兴、河北石家庄以及山东泰安样品综合排序分列1,2和3位,表明从无机元素考虑这三个产地果用银杏叶样品品质较好。本研究为我国银杏资源的综合利用与开发提供了参考。

Inorganic elements were determined by ICP-AES using microwave digestion,and principal components analysis（PCA） was used for analysis.The result showed that ginkgo biloba leaves contained more than 22 inorganic elements,Fe,Zn,Cu,Mn,Cr,Co,Ni,Sr,B,Si and Ni were essential trace elements,and Ca,P,K,Na and Mg were essential macro elements.PCA with seven factors（F1,F2,F3,F4,F5,F6,F7） selected could be used to evaluate the quality of ginkgo biloba leaves.The function was following F=0.230 17F1＋0.122 39F2＋0.079 67F3＋0.078 97F4＋0.065 25F5＋0.062 03F6＋0.056 71F7.The samples from Taixing,Shijiazhuang and Taian was the top three which indicated the quality in those cultivation sources was better based on inorganic elements.All the results will provide good basis for comprehensive utilization of ginkgo biloba leaves,especially the leaves from fruit cultivars.