Patent ID: 7791716
Filing Date: 2010-09-07
Classification: G01F

Abstract:
1. A method of measuring a liquid volume of a sample solution in a vessel, the method comprising the steps of: a. adding to the vessel a known volume of diluent including a known concentration of a diluent dye which absorbs light at a wavelength unique to the diluent; b. adding a volume of the sample solution to the vessel, wherein the sample solution includes a known concentration of one or more dyes, wherein the one or more dyes are selected to produce multiple distinct detectable light absorbance spectral features at a corresponding number of distinct wavelengths, each of which is distinct from the wavelength unique to the diluent, and wherein the sample solution does not include the diluent dye; c. mixing the diluent and the sample solution in the vessel to produce a mixture of the sample solution and the diluent; d. measuring the absorbance of the mixture of the sample solution and the diluent at one or more wavelengths at which the distinct detectable light absorbance spectral features can be detected; and e. calculating the volume of the sample solution added to the vessel based on the measured absorbances, absorptivity of the diluent and the sample solution and the known volume of the diluent.