METHOD FOR WATER COLOUR DETERMINATION Russian patent published in 2016 - IPC G01J3/50 

FIELD: chemistry.

SUBSTANCE: water sample is placed in dish and measurement of optic density spectrum in visible range of wavelengths is carried out, with empty dish being used as comparison sample. Analogous measurements are carried out with placement of distilled water into dish instead of water sample. Colour coordinates in colour space CIE 1976 L*a*b* are determined for obtained spectra of water sample and distilled water. After that, value of colour difference between colour coordinates of distilled water and water sample in colour space CIE 1976 L*a*b* is determined, which is used to determine water colour by means of calibration characteristics, colour scale predetermined for water solutions.

EFFECT: increased accuracy of water colour determination.

2 cl, 2 dwg