title: [Analysis and comparison of trace elements of herba euphorbiae humifusae in different periods by microwave digestion-atomic absorption spectroscopy].
abstract: Herba euphorbiae humifusae is the dried whole plant of Euphorbia humi fusa Willd. that belongs to euphorbiaceae. In the present paper, the microwave digestion procedure was used to digest herba euphorbiae humifusae collected in different periods, and then flame atomic absorption spectrometry (FAAS) was used to determine the contents of eight kinds of trace elements of herba euphorbiae humifusae in different periods, and the change in the contents of trace elements at different times was studied and analysed. The results showed that of all the trace elements of herba euphorbiae humifusae in different periods, element Fe was the highest in June, element K was in August at the highest level, element Mn reached the highest content in September, elements Na and Ca were dividedly at the highest content in October and November, and in December the highest content elements were Zn, Cu and Mg. In one word, the change of Na and Ca was jumping, while the change of Cu and Zn was comparatively mild. The results provide scientific basis for the time of collection of herba euphorbiae humifusae.
authors.affiliation: Department of Chemistry, Zhejiang Normal University, Jinhua 321004, China. 2008210557@zjnu.net
authors.forename: Wei
authors.initials: W
authors.lastname: Xiong
authors.forename: Miao-zhen
authors.initials: MZ
authors.lastname: Cai
authors.forename: Hong
authors.initials: H
authors.lastname: Wang
authors.forename: Rui-peng
authors.initials: RP
authors.lastname: Yu
authors.forename: Cun-gui
authors.initials: CG
authors.lastname: Cheng
mesh_terms: D028481:Euphorbia / Q000737:chemistry*; D007501:Iron; D008345:Manganese; D008872:Microwaves; D012964:Sodium; D013054:Spectrophotometry, Atomic; D014131:Trace Elements / Q000032:analysis*
chemical_list: D014131:Trace Elements; D008345:Manganese; D012964:Sodium; D007501:Iron