title: [Determination of microelements in C. tangutica (Maxim.) korsh flower by FAAS].
abstract: The powder was digested with HNO3-HClO4 mixed acid (4 : 1) before determination. The eleven microelements in C. tangutica (Maxim.) korsh flower were determined by FAAS, and the determination medium was 4% nitric acid. The work conditions, accuracy and precision of the method were studied. The experimental results show that the interaction of the elements were small under the conditions of determination, and no significant effect on the result. The linear correlations of standard curves are good (r = 0.9871-1.000 0). The recovery (n = 7) is 98.3%-105.1%, and the RSD (n = 7) is 0. 23%-1.07%. It can be used to determine the trace elements simultaneously in C. tangutica (Maxim.) korsh flower. The method has good precision and accuracy, so it is able to meet the requirements for analysis. The contents of Ca, Mg, K, Cu, Fe, Zn, Mn, Na and Co were 206.30, 284.50, 3415.20, 0.116 6, 62.171, 3.275, 67.826 5, 28.00, 0.133 3 mg (100 g)(-1)', respectively, while Cd and Ni were not found in the samples. The results provided theoretical basis for the effect of C. tangutica (Maxim.) korsh herbal medicine.
authors.affiliation: Key Laboratory of Resources and Environment Chemistry of West China, Department of Chemistry, Hexi University, Zhangye 734000, China.
authors.forename: Dong-Qing
authors.initials: DQ
authors.lastname: Wu
authors.forename: Cai-Xia
authors.initials: CX
authors.lastname: Li
authors.forename: Hong-Gang
authors.initials: HG
authors.lastname: An
authors.forename: Chun-Yan
authors.initials: CY
authors.lastname: Zhang
mesh_terms: D035264:Flowers / Q000737:chemistry*; D019686:Lamiaceae / Q000737:chemistry*; D016014:Linear Models; D015203:Reproducibility of Results; D013054:Spectrophotometry, Atomic; D014131:Trace Elements / Q000032:analysis*
chemical_list: D014131:Trace Elements