(Journal of Central South Institute of Mining and Metallurgy,
No 2, (1987), p217)
(Chemical Abstract 107:189736m)
H. Liu, G. Zhu and S. Huang
Department of Chemistry, Central South University of Technology, Changsha, P. R. China
A Z-80 single-board microcomputer was used in combination with a JP-1A polarograph to form a fully automated polargraphic system. An automatic sample replacement apparatus was constructed. The sweep signals are generated by the microcomputer through a 12 bit D/A converter and the polargraphic current signal is digitized by a 12 bit A/D converter. The software for the control, data acquisition, and processing (including smoothing, peak height and sample concentration calculation, linear fitting, differentiating, integration, and convolution calculation) is an assembly program of high efficiency, occupying only 4 K bites. The relative standard deviations for the measurement of a standard of 48 mg Cd/L were 0.24% (regular wave).