MEASURING METHOD OF CONCENTRATION OF COMPONENT TO BE INSPECTED IN WATER TO BE MEASURED

摘要

PROBLEM TO BE SOLVED: To provide a method for judging whether a proper amount of a color reagent is injected in consideration to the injection error of the color reagent in measuring the concentration of a component to be inspected in water to be measured using color reaction.;SOLUTION: The measuring method of the concentration of the component to be inspected in water to be measured includes a chemical liquid injection judgement step for presetting the allowable maximum and minimum injection amounts of a chemical liquid containing the color reagent and a coloring matter in consideration of the injection amount of the chemical liquid, for measuring the development degree of a color reaction liquid on the basis of the light absorbing wavelength of the coloring matter to respectively form a calibration curve large in color development degree and a calibration curve small in color development degree in relation to the concentration of the component to be inspected in reference water and the color development degree of the color reaction liquid, for setting the region surrounded by the calibration curves as a chemical liquid injection judge region, for measuring the color development degree of the color reaction liquid on the basis of the light absorbing wavelength of the coloring matter in a measuring process of water to be measured, and for judging whether the obtained color development degree is present in the region of the color development degree corresponding to the concentration of the component to be inspected in the water to be measured in the concentration of the component to be inspected of the chemical liquid injection judge region.;COPYRIGHT: (C)2008,JPO&INPIT