This is a pdf version of an official EPA method for the analysis of cyanide. It discusses a variety of quality control procedures a wide range of controls that must be used for method maintenance and development. Within the context of teaching, this site could be viewed as unique in allowing students to work through all contingencies that must be moniitored for a measurement to be deemed valid. It defines and contains a variety of control parameters with mathematical descriptors. The chemistry for the flow injection analysis of cyanide is provided as well as a diagram of the instrumental setup. Cyanide is widely dispersed in the environment and its analysis should be of interest to students.
The website is available here .