title: [Evaluation and analysis of inorganic elements in Ginkgo biloba leaves by microwave digestion-ICP-AES].
abstract: Abstract 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.
authors.affiliation: Nanjing University of Chinese Medicine, Nanjing, China. yaobest@163.com
authors.forename: Xin
authors.initials: X
authors.lastname: Yao
authors.forename: Gui-Sheng
authors.initials: GS
authors.lastname: Zhou
authors.forename: Yu-Ping
authors.initials: YP
authors.lastname: Tang
authors.forename: Er-Xin
authors.initials: EX
authors.lastname: Shang
authors.forename: Shu-Lan
authors.initials: SL
authors.lastname: Su
authors.forename: Da-Wei
authors.initials: DW
authors.lastname: Qian
authors.forename: Jin-Ao
authors.initials: JA
authors.lastname: Duan
mesh_terms: D020441:Ginkgo biloba / Q000737:chemistry*; D007287:Inorganic Chemicals / Q000032:analysis*; D008872:Microwaves; D018515:Plant Leaves / Q000737:chemistry*; D025341:Principal Component Analysis; D013054:Spectrophotometry, Atomic / Q000379:methods*; D014131:Trace Elements / Q000032:analysis*
chemical_list: D007287:Inorganic Chemicals; D014131:Trace Elements