Study on content determination of Cu,Pb,As,Hg and Cd in Taizishen and the other two kinds of Chinese herbal medicine

Objective:To establish a method for the content determination of Cu,Pb,As,Hg and Cd in Taizishen and the other two kinds of Chinese herbal medicine. Methods:According to two law element of choice of different dry and wet digestion herbs,using the flame method with Cu content measured,measuring Pb,Cd content by graphite furnace method,combined with hydride generator determined As,Hg content,using the soil to send external review of the way,back the growth of heavy metals in soil on the content of Chinese herbal medicines. Results:Heterophylla medicinal methods in order to establish a stable,precision for Cu is 0.30%,Pb is 5.30%,As is 1.80%,Hg is 1.60%,Cd is 2.90% and the recovery for Cu is 98.00% (RSD=1.60%),Pb is 90.00% (RSD=1.20%),As is 83.00% (RSD=1.20%),Hg is 93.00% (RSD=3.60%),Cd is 90.00% (RSD=3.60%),while the growth of medicinal residues in soil,heavy metals have a certain impact. Conclusion:This type of medicine content determination for the Cu,Pb,As,Hg,Cd provide a reliable detection method for the development of quality standards provide a scientific basis.