title: Determination of trace elements in Rheum moorcroftianum by AAS.
abstract: Micro and macro elements such as Zn, Cu, Mn, Fe, Co, Na, K, Ca and Li were detected from Rheum moorcroftianum Royle, a plant used in folk medicines. Altitudinal and seasonal variation of these trace elements in cultivated and wild roots and leaves of R. moorcroftianum were quantified by atomic absorption spectroscopy. The highest concentrations of Zn, Cu, Mn, Fe, Co, Na, K, Ca and Li were found to be 376.0 ± 0.9, 83.0 ± 4.6, 322.0 ± 6.0, 920.0 ± 1.9, 72.0 ± 1.5, 402.0 ± 7.8, 10,235.0 ± 7.0, 12,336.0 ± 2.6 and 59.9 ± 0.3  mg kg(-1), respectively, in all the samples analysed.
authors.affiliation: Department of Chemistry, HNB Garhwal University, Srinagar (Garhwal)-246 174, Uttarakhand, India.
authors.forename: Pramod
authors.initials: P
authors.lastname: Singh
authors.forename: Jagmohan S
authors.initials: JS
authors.lastname: Negi
authors.forename: M S M
authors.initials: MS
authors.lastname: Rawat
authors.forename: Geeta
authors.initials: G
authors.lastname: Joshi
mesh_terms: D000531:Altitude; D007194:India; D008670:Metals / Q000032:analysis*; D018515:Plant Leaves / Q000737:chemistry*; D018517:Plant Roots / Q000737:chemistry*; D012250:Rheum / Q000737:chemistry*; D012621:Seasons; D013054:Spectrophotometry, Atomic
chemical_list: D008670:Metals