This document discusses various electrochemical techniques including voltammetry and polarography. It describes how voltammetry works by plotting current as a function of applied potential. Polarography uses a mercury working electrode. Different electrode configurations (e.g. solid vs. dropping mercury electrode) and cell designs (e.g. 2-electrode vs. 3-electrode) are discussed. Various factors that influence the measurements including mass transport and potential excitations are also summarized.