Background: Application of electrochemical sensors for analysis of food, biological and
water polluting compounds helps to speed up their analysis in the real samples. Electrochemical sensors
with low cost, fast response and portable ability are a better choice compared to traditional
methods for analysis of electro-active compounds such as HPLC. Therefore, in recent years, many
analytical scientists have suggested this type of analytical method for analysis of food, biological
compounds and water pollutants.
Objective: Due to low cost, easy modification and low non-faradic current, the carbon paste electrode
is a suitable choice as a working electrode in the electrochemical and especially voltammetric analysis.
On the other hand, modification of carbon paste electrode can improve the quality of the sensor
for the analysis of electroactive compounds at nanomolar level.