APPLICATION OF COLORIMETRY AS AN ANALYTICAL TOOL

作者：Nikitina Nataliya^*; Reshetnyak Elena; Shevchenko Valeriy; Zhitnyakovskaya Yana

来源：Studia Universitatis Babes-Bolyai Chemia, 2011, 56(4): 265-282.

• colorimetry
• chromaticity coordinates
• test-system
• sorbent

Colorimetry method was applied for estimation the precision of the measurement results of chromaticity characteristics of colored sorbates on paper, polyurethane foam and silica gel using a portable photometer-reflectometer. The relative standard deviation of measurement results is not exceed 1.0%; the trueness and precision of results of determination with the photometer-reflectometer are not worse than results obtained using a scanner or a spectrophotometer with an attachment for diffuse reflectance. A two-parameter colorimetry was allied to study the possibility of the determination separately of two metals in a mixture with the reagent indicator papers and gelatin films. It was established that application of two-parameter colorimetry has significant limitations; the relative standard deviation of the results of separately two-colorimetric determination may exceed 50%. Colorimetry method and statistics of observations were used for the chromaticity evaluation of uniformity of color scales prepared using transparent gelatin films, polyurethane foams and indicator papers. For choosing an optimal scale for visually test determinations should be given the preference to the visual method - statistics of observations.

• 出版日期2011