The intention of this book is to review the modern voltammetric techniques with respect to introduction, experimental and results and discussion and shows how these relate to the voltammetric analysis of pesticides. The rising importance of voltammetry in the development of modified electrodes and nanosensors is also highlighted. The effect of substituents on the reduction of selected chosen functional group which are lying along the functional group has been discussed. The described electroanalytical methods have been conveniently applied and which has been routinely adopted for the determination of pesticides in urine and soil samples.