Determination of the Content of the Mineral Elements in Several Medicinal Materials of Pteridophyte by Atomic Absorption Spectrometry

The contents of eight kinds of elements,such as Ca,Mg,Cu,Zn,Mn,Fe,Pb,Cd,in the bracken,cyrtomium fortunei,lygodium japonicum,pteris vittata,were determined by Atomic Absorption Spectrometry.The result showed that,the content of the Ca,Mg,Cu,Fe,Zn,Mn,in several medicinal materials of pteridophyte,in which the content of the Cu was less than 9.89μg/g,was abundant,the content of the Pb,Cd was low,which well meets the requirements of the limited quantum of the heavy metal and the harmful elements stipulated in the Chinese Pharmacopoeia.The content of the mineral elements had some relation to the growth environment and the enriching effect of the medicinal materials upon the elements,and the content of some elements in the medicinal materials varies from species to species,region to region.The relative deviation of the determination results was less than 4.3%,the correlation coefficient of the regression equation of the working curve was between 0.9984 and 1.000,and the recovery of the standard addition was 92.5%~105.3%.