Determination of trace elements and heavy metals in Pogostemon cablin Benth.by microwave digestion-atomic absorption spectroscopy

Contents of five kinds of mineral elements(Mn,Zn,Fe,Mg and Ca) and three kinds of heavy metals(Cu,Pb and As) in Pogostemon cablin Benth.were determined.Graphite furnace atomic absorption was adopted to determine Cu,Pb,As contents,and flame atomic absorption was used to determine Mn,Zn,Fe,Mg and Ca contents after P.cablin Benth.was digested by microwave-assisted sample digestion.The results showed that the contents of Mn,Zn,Fe,Mg,Ca,Cu,Pb and As were 10.88μg/g,17.33μg/g,233.87μg/g,856.32μg/g,1213.41μg/g 3.68μg/g,0.42μg/g,and 0.18μg/g,respectively.The method was simple,rapid and accurate.The addition standard recoveries were between 98.8%-105.0%,and the relative standard deviation was between 0.42%-1.96%.