title: [Simultaneous analysis of alkali metals and alkaline earth metals in Chinese herbal medicine by ion chromatography].
abstract: A simple and rapid method for the analysis of cations by using ion chromatography was developed. The results showed that the content ratio of Na+, NH4+, K+, Mg2+, Ca2+ in rhizoma chuanxiong and semen zizyphi spinosae are different. The detection limits of cations (S/N = 3) were 0.001-0.013 mg/L. The calibration curves of peak areas for all analytes were linear over two or three orders of magnitude with a regression coefficient (r2) of 0.9995-1.0000.
authors.affiliation: Department of Chemistry, Tsinghua University, Beijing, 100084.
authors.forename: Z
authors.initials: Z
authors.lastname: Wang
authors.forename: M
authors.initials: M
authors.lastname: Ding
authors.forename: P
authors.initials: P
authors.lastname: Chen
mesh_terms: D002845:Chromatography / Q000379:methods*; D004365:Drugs, Chinese Herbal / Q000737:chemistry*; D008672:Metals, Alkali / Q000032:analysis*; D008673:Metals, Alkaline Earth / Q000032:analysis*; D013997:Time Factors
chemical_list: D004365:Drugs, Chinese Herbal; D008672:Metals, Alkali; D008673:Metals, Alkaline Earth