title: [Determination of nine trace elements in Dioscorea opposita thumb by flame atomic absorption spectrophotometry].
abstract: The contents of the potassium, calcium, sodium, magnesium, copper, zinc, iron, manganese, strontium and nickel in Dioscorea opposita thumb were determined. The relative standard deviation(RSD) of the first eight contents is 0.43%, 1.10%, 4.41%, 0.68%, 1.44%, 1.88%, 1.29% and 0.03% respectively, and the percentage recovery is 90.0%-111.0%. The method is convenient and accurate. It can be used to determine the trace elements simultaneousy in Dioscorea opposita thumb.
authors.affiliation: Department of Chemistry, Resources Environment and GIS Key Lab of Beijing, Capital Normal University, Beijing 100037, China.
authors.forename: Wei
authors.initials: W
authors.lastname: Zhang
authors.forename: Zhuo-Yong
authors.initials: ZY
authors.lastname: Zhang
authors.forename: Yan-Zhi
authors.initials: YZ
authors.lastname: Shi
authors.forename: Guo-Qiang
authors.initials: GQ
authors.lastname: Fan
mesh_terms: D027742:Dioscorea / Q000737:chemistry*; D004365:Drugs, Chinese Herbal / Q000032:analysis*; D013054:Spectrophotometry, Atomic / Q000379:methods*; D014131:Trace Elements / Q000032:analysis*
chemical_list: D004365:Drugs, Chinese Herbal; D014131:Trace Elements