Analysis on residues of organochlorine pesticides and heavy metals in planted soil and medicinal materials of Prunella vulgaris

Authors Chen Yuhang; Guo Qiaosheng; Zhang Xianxiu; Fang Hailing; Wang Chengya

Journal Journal of Plant Resources and Environment , 2012,2:21

Abstract Contents of organochlorine pesticides and heavy metals in planted soil and spica and whole plant of Prunella vulgaris L.from two planting bases of Lujiang in Anhui Province and Hongze in Jiangsu Province were determined by GC and ICP-AES,and safety of soil and medicinal materials of P.vulgaris was evaluated according to pollution indexes and relative standards.The determination results show that the contents of organochlorine pesticides and heavy metals in planted soil and medicinal materials have obvious differences between two planting bases.Contents of Pb,Cd,Cu,Cr,As and BHC in spica and whole plant from Lujiang are 3.361 and 3.953,0.172 and 0.190,8.258 and 7.722,3.423 and 2.658,0.284 and 0.355,0.003 and 0.004 mg·kg~(-1),respectively,and Hg and DDT are not detected.Contents of Pb,Cd,Cu,Cr,Hg and BHC in spica and whole plant from Hongze are 2.399 and 1.558,0.155 and 0.111,7.682 and 6.756,4.259 and 3.801,0.077 and 0.102,0.003 and 0.006 mg·kg~(-1),respectively,and As is not detected and DDT in spica is also not detected.Contents of Cd,Cu,Cr,As,Hg,BHC and DDT in soil of Lujiang are 0.001,12.943,47.417,1.008,0.003,0.003 and 0.002 mg·kg~(-1),respectively,and Pb is not detected.Contents of Pb,Cd,Cu,Cr,As,Hg and BHC in soil of Hongze are 3.443,0.002,18.655,63.385,3.701,0.141 and 0.004 mg·kg~(-1), respectively,and DDT is not detected.Comparison result shows that heavy metal residue in spica of P.vulgaris is higher than that in whole plant,but residues in both are lower than the national standards.Single pollution index of heavy metals and organochlorine pesticides in soil is less than 1,and comprehensive pollution index in soil from Lujiang and Hongze is 0.286 and 0.399,respectively.Therefore,soil of two planting bases is in the safe grade and reaches clean level.

Species covered 夏枯草(变种) Prunella vulgaris