Electrochemical determination of mercury: A review

Mercury is a metal that has been extensively studied, in large part due to its high toxicity. Therefore, mercury levels must be monitored in different sample types using analytical methods. This review summarizes the electrochemical methods that have been used for mercury analysis in a variety of samples. A critical evaluation of the methods and electrode materials employed for mercury analysis is presented according to the following classifications: bare electrodes, chemically modified electrodes and nanostructured electrodes. The advantages and disadvantages of each type of electrode material regarding mercury analysis are also presented. •Due to the high toxicity of all mercury species, the analysis of mercury in a variety of samples is of utmost importance.•Among the analytical methods available, the electrochemical analysis of mercury has considerable advantages due to the low cost of the instrumentation required, the short length of time required, and the ease of operation•Many types of bare, chemically modified and nanostructured electrodes have been used for the electrochemical analysis of mercury.•Although progress has been made, unresolved issues remain regarding the implementation of electrochemical analysis for the detection of mercury in standard laboratories.