Determination of Trace Metal Elements in Fruits of Rosa multiflora Thunb Using Microwave Digestion Followed by Flame Atomic Absorption Spectrophotometry

A flame atomic absorption spectrophotometric(FAAS) method based on microwave digestion was proposed for the determination of 11 trace metal elements(Ca,K,Mn,Zn,Mg,Fe,Cu,Na,Cr,Ni and Sr) in the fruits of Rosa multiflora Thunb grown in Xinjiang autonomous region.Temperature programmed rise was used for the microwave digestion of samples.The optimal digestion solvent was nitric acid.The proposed method exhibited good accuracy and precision.Spike recoveries of 11 trace metal elements in a real sample were within the range of 96.50%-104.50%,with relative standard deviations(RSDs) of no more than 3.21%.Actual determinations demonstrate that the fruits of Rosa multiflora Thunb grown in Xinjiang autonomous region are rich in Ca,Mg,K,Na,Mn and Fe beneficial for health and contain small amounts of Cr and Ni.