Quantitative analysis manner null of the specimen material in the liquid sample which uses the bias dry type analysis

摘要

PURPOSE:To improve concentration measuring accuracy of material to be detected by correcting a deviation of a catoptric concentration value generating in case an analytical characteristic used analytical element varied from a standard dividing element due to a deterioration with the lapse of time and a rod difference and the like. CONSTITUTION:First, two kinds of standard solutions with different content of the material to be detected are given to a couple of analytical elements and the coloring or a color change is measured to calculate the respective catoptric concentration ODX1 and ODX2. Then, the solution samples having the prescribed content of the material to be detected are given to a couple of analytical elements and a linear expression prescribing the relation between the catoptric concentration ODX which is obtained measuring the coloring or the color change and the catoptric concentration ODS which is measured giving the above-mentioned solution samples to the standard analytical elements is made. Then, the catoptric concentration value when the solution samples containing the unknown quantity of the material to be detected are given to a couple of analytical elements is calculated and the content of the unknown quantity of the material to be detected is calculated using the above-mentioned linear expression and an analytical curve. In this way, the concentration can be measured with high accuracy by a simple method.