Abstract
A new method for the preparation of a DNA modified carbon paste electrode has been developed and its electrochemical behavior has been investigated. It is found that 6-mercaptopurine(6-MP) can be accumulated onto this electrode surface. This electrode has been used for the determination of 6-MP by differential pulse voltammetry. The linear range is between 5.0 × 10-6 and 8.0 × 10-5mol/L, with a detection limit of 2.0 × 10-6mol/L. The relative standard deviation is 3.6% for eight successive determinations of 2.0 × 10-5mol/L 6-MP. The determination of 6-MP tablets was also carried out and satisfactory results have been obtained.
ACKNOWLEDGMENTS
The authors greatly appreciate the supports from National Natural Science Foundation of China (29835110), Doctoral fund of the National Education Ministry and Jiangsu Natural Science Foundation of China.