ABSTRACT
ABSTRACT: A new application of high resolution continuum source atomic absorption spectrometry has been developed for the determination of Ca, Fe, Zn, Mg, Mn, Cd, Pb and Cu in polygonatum tea. The samples were digested by microwave. Under the selected determination conditions, the correlation coefficients better than 0.995 and the recoveries between 96.5 and 104.7% were obtained for these eight metal elements. The characteristic concentrations were 0.092 mg/L (Ca), 0.17 mg/L (Fe), 0.033 mg/L (Zn), 0.008 mg/L (Mg), 0.15 mg/L (Mn), 0.021 mg/L (Cd), 0.58 mg/L (Pb) and 0.092 mg/L (Cu), respectively. The contents in polygonatum tea were 2.091 ± 0.057 g/kg (Ca), 0.481 ± 0.009 g/kg (Fe), 14.11 ± 0.32 mg/kg (Zn), 1.287 ± 0.025 g/kg (Mg), 46.08 ± 0.98 mg/kg (Mn), 7.852 ± 0.287 μg/kg (Cd), 9.558 ± 0.296 μg/kg (Pb) and 1.256 ± 0.028 mg/kg (Cu), respectively. Therefore, the proposed method was accurate and stable with a high practical value. It provided scientific basis for determination of metal elements in food.
