Abstract
An expert system for the voltammetric determination of Cu, Zn, Cd, Pb and In was developed. The system guides the user in the choice of sample treatment, the most appropriate voltammetric procedure and the identification and determination of the trace metals. The techniques implemented are differential-pulse polarography and anodic stripping voltammetry, using mercury drop electrodes. Only well known methods are recommended, with particular attention to standard methods. For the identification and resolution of overlapping peaks (Cd and In), the system may call two external programs, written in turbo BASIC. Quantification is carried out by means of the multiple standard addition method, and the quality of the calibration graph is tested by several statistical validation tests. The tool kit for the development of the expert system KES (Knowledge Engineering System) is used. Only commercially available material was used. The system is easily portable if the shell for the development of the expert system is employed.
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