Determination of seven mineral elements contents in three wild vegetable by flame atomic absorption spectrometry

The contents of seven kinds of mineral elements such as K,Na,Ca,Mg,Fe,Mn,Zn in Cryptotaenia japonica Hassk,Phyllostachys heteroclada oliver,Pteridium aquilinum var.latiusculum from Hunan province were determined by flame atomic absorption spectroscopy after the samples were digested by wet digestion and dry ashing methods.This method exhibited spike recoveries for 7 mineral elements from 97.5% ～ 102.5% and RSDs of sample results was less than 1.21%,with good accuracy and precision.In addition,the experimental results indicate that there were abundant elements in three kinds of wild vegetables,especially rich in Ca,Mg,Fe,Zn.Except the content of Cu,others elements contents in C.japonica,P.heteroclada oliver all higher than theirs related species vegetables,the contents of Ca,Mg in C.japonica were the highest in three wild vegetables,the Ca and Mg contents were respectively 212.25 mg/100g,50.8 mg/100g,and respectively 2.82,2.65 times of contents of celery,and the contents of Mn in P.aquilinum var.latiusculum was 2.96 mg/100g,which was the highest in three vegetables.All of the three wild vegetables have high development and utilization values.