METHOD OF AND APPARATUS FOR DETERMINING EXTINCTION OF LUMINOUS FLUX PASSING THROUGH A SAMPLE

摘要

In the disclosed process, a liquid sample is mixed as a first reagent with a second reagent and a first extinction value is determined before or shortly after the two reagents contact each other. Changes in the extinction are afterwards detected continuously or intermittently and the value and/or speed of the changes is compared with reference values. Corresponding deviations of the tested sample are used to qualitatively and/or quantitatively evaluate the first reagent to be tested. The device has a light shaft (1) in which the sample is arranged in a measurement shaft (2) and at one end of which a light source (4), for example a luminescent diode is arranged, and at the other end of which a light sensor (5) is arranged. An electronic measurement value acquisition unit is connected to the light sensor (5) to convert the analogue extinction measurement values into digital values and if required to store them. One disclosed application of the process and/or device relates to the determination of the blood coagulation time.