Polarographic Derivative Wave Trace Element Analysis In Traditional Chinese Medicine

Microelement is beneficial to human health, so the determination ofmicroelement in Chinese traditional medicines plays an important part inthe quality assessment. In this paper, the application of the derivativepolarographic waves of microelement in Chinese traditional medicineswas researched.In the first chapter of this thesis, the applications and prospects foradvanced electroanalytical techniques in Chinese medicine analysis, andthe development for determination of microelement in Chinese traditionalmedicines was summarized. And the polarography was introducedsimply.In chapter 2, sensitive second derivative waves of Cu (â…¡), Pb (â…¡),Cd (â…¡), Ni (â…¡), Zn (â…¡), Fe (â…¡) and Mn (â…¡) in the substratesolution containing NH₃, NH₄Cl, gelatin and ascorbic acid wasresearched. A new method for simultaneous determination of the sevenmicroelements in aqueous solutions was developed. The method has beenused successfully in rapid and simultaneous determination of 7microelements in Dan-shen.In chapter 3, sensitive second derivative waves of Mo(â…¥),Cr(â…¢),Cd (â…¡),Se (â…£),Zn (â…¡) in the substrate solution containingCH₃COOH, CH₃COONa and K₃PO₄ was researched. A new method forsimultaneous determination of the five microelements in aqueoussolutions was developed. The method has been used successfully in rapidand simultaneous determination of 5 microelements in Safflower.In chapter 4, in order to revise the matrix effect in voltammetry ofsimultaneous determination of multicomponent, a new method waspresented. The method was based upon the data of experiment, then thecomputer programme was runned to get matrix coefficient. And at last,the matrix coefficient was used to get the concentration of eachcomponent in the solution. This is a good method to deal with theproblem of the matrix effect.