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V. V. Apyari, S. G. Dmitrienko, Yu. A. Zolotov
Analytical possibilities of
digital colorimetry. determination of nitrite using polyurethane foam
Abstract
By the
example of determination of nitrite as polymeric azodye, the possibility of
using office scanner, digital camera and computer data processing in different
colorimetric coordinates systems (RGB, CMYK, LAB and HSV) has
been studied. The polymeric azodye was obtained by azocoupling reaction between
diazotized polyurethane foam (PUF) with
3-hydroxy-7,8-benzo-1,2,3,4-tetrahydroquinoline. The analytically important
colorimetric coordinates in these systems have been revealed and compared, the
coordinates resulting in maximum sensitivity of nitrite determination have been
chosen. It has been shown that calibration curves of the colorimetric
coordinates versus concentration of nitrite in aqueous solution can be
described by first order exponent. Detection limits of the determination of
nitrite using scanner and digital camera are comparable. The least detection
limits of nitrite (1 – 3 ng mL-1) are achieved in RGB and CMYK
colorimetric systems.
Copyright (C) Chemistry Dept., Moscow State University, 2002
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