6 Electrochemical methods
In this section we look at some examples of electrochemical analysis being carried out in the field.
In essence this entails taking measurements using electrodes contained within electrochemical cells; the big bonus for field testing being that they can provide direct readings from a body of water, i.e. there is no need to remove a sample. In principle field testing apparatus doesn't differ much from its laboratory based counterpart, except modifications have been made to make it more robust for outdoor use, and in particular probes (often called sonds) are available with long cables enabling measurements to be made at depth in situ.
You will see this demonstrated in the videos at the end of this free course.