Determination Of Maltol And Trace Elements By Electrochemical Methods

A new method was proposed for the determination of maltol by differential pulse voltammetry on a GC electrode. In the solution of 0.16M NaCl and 1M NH4Cl-NH3, maltol had an oxidative wave at the peak potential 0. 8-0. 9V and the peak current was linear with its concentration in the range of 1 X 10-5-6 X 10-4M. The detection limit was 4X10-6M and the relative standard deviation was 0.6%. The samples treated by ultrafilter can be determined directly and the proposed method is simple, easy operation, no pollution and little interference.This paper described the determination of manganese used by linear sweep voltammetry and semi-differential on a preactived GC electrode. The GC electrode was actived by cyclic voltmmetry in the solution of 0. 1M NaOH. In the 0. 04M NH4Cl-NHs, the anodie peak potential of the manganese (II) was about 0.6V. The peak current was linear with its concentration in the range of 1 X10-9-1 X 10-5 M, and the relative standard derivation was 3.4%.The electrochemical character of four drugs unloding aluminum and their derivation was studied in this paper. A new method was developed for the indirect determination of aluminum by differential pulse voltammetry on GC electrode. In 0.06M NH4Cl-NH3, the oxidative peak potential was 0. 56V and the decrease of the peak current of Hdmp was linear with the increase of aluminum concentration from 1X106 to 5X10"5M. The detection limit was 5X10"7M, and the relative standard derivation was 1. 8%.