Abstract
SUPERCOLOR is a microcomputer program for the computation of chromaticity parameters from spectrophotometric data. The program is written in BASIC for the HP-200 computer series and it allows the characterization of indicator colour transitions in the standard CIE chromaticity systems. The numerical results for up to 12 indicators can be compared in the same plot for each chromatic system, so that colour changes are easily compared. The p K a values, pH transition ranges, pH of maximum colour change, SCD values and optimum indicator concentration for visual titrations can be calculated, as well as the colour coordinates. SUPERCOLOR also provides subroutines for computation of screened indicators and simulation of the colour changes of these indicators or other indicator/inert dyes mixtures. The results for some common indicators are presented.
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