Colour changes of chemical indicators-III: colour specification and its accuracy.
The systematic deviations involved in methods for computation of chromaticity co-ordinates have been studied for the specification of indicator colour changes. The weighted ordinale method (Deltalambda = 10 nm) has proved to be satisfactory for evaluation both of C.I.E. and complementary co-ordinates. The C.I.E. colour specification should be included among basic data about chemical indicators.
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Department of Analytical Chemistry, College of Chemical Technology, Pardubice, Slov. povstani 565, Czechoslovakia.
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