Voltammetry is an electrochemical technique used to analyze the concentration of chemical substances by measuring the current that flows in an electrochemical cell as a function of an applied voltage. This method involves varying the voltage and observing how the current changes, which provides information about the redox (reduction-oxidation) properties of the analyte. In voltammetry, different types of techniques, such as cyclic voltammetry and differential pulse voltammetry, can be employed to enhance sensitivity and selectivity. These methods are widely used in fields like environmental monitoring, pharmaceuticals, and food safety to detect trace levels of various compounds.