While the term colorimetry often is used in a general sense to mean color measurement, it differs from spectrophotometry, a related but distinct method of color measurement. In colorimetry, the quantification of color is based on the three-component theory of color vision, which states that the ...
Phenol-sulfuric acid method is another simple and reliable method for determining sugar present in samples [26]. Analysis of sugars by the above described methods is greatly affected by metal ions (Cu2 +, Fe3 +, and NO3 −) and organic acids present in fermentation broth. Such ...
The present invention provides a colorimetry device and a colorimetry method. To achieve the purpose of the present invention, the colorimetry device is to measure the color of an object to be measured at a high degree of accuracy by receiving light at a measurement timing capable of sufficiently...
The method of trichromaticity colorimetry enables determination of the colour trajectory in the Commission Internationale de l'Eclairage (CIE) 1931 colour space, where each colour corresponds to the appropriate and unique point in that space whose positional parameters are related to the tristimulus valu...
A new method was developed to insert mineral pigments in the first microns of the concrete during the setting and a colorimetric protocol was developed to evaluate the quality and durability of the obtained color. The details of the coloring process will not be presented. The optical parameters ...
Measurement of the surface wavelength distribution of narrow-band radiation by a colorimetric method A method is suggested for determining the wavelength of narrow-band light from a digital photograph of a radiating surface. The digital camera used should ... Kraiskii, A.V.Mironova, T.V.Sultanov...
A simple smartphone-based digital image colorimetry is proposed for the determination of vancomycin in drugs. The analytical method relied on the reaction
CAT is a method for computing the corresponding color under a reference illuminant for a stimulus defined under a test illuminant. Due to its good performance, the Bradford CAT is recommended for appearance transformations from one illuminant to another. Such transformations are needed when ...
Summary The Weisz ring colorimetry method has been applied to the microscale determination of alkaloids. The following substances were determined: nicotine, atropine, cinchonine, quinine, narcotine, morphine, codeine, aconitine, strychnine, and brucine. The errors obtained amounted, on an average, to ...
The procedure was successfully applied for the classification of milk samples as compliant and non-compliant as well as for the indirect determination of the protein content in milk. The quantitative results agreed with those obtained by the reference method (near infrared spectroscopy) at a 95% ...