Patent ID: 9664678
Date: 2017-05-30
CPC Classifications: G01N

Claim:
1. An automated analyzer, comprising: a sample container that holds a sample; a reagent container that holds a reagent containing latex particles having an average peak particle diameter ranging from 0.3 pm to 0.43 pm and to which antibodies are sensitized; a reaction container that holds a reaction solution into which the sample in the sample container and the reagent in the reagent container are mixed; a rotating mechanism that rotationally moves the reaction container; a light source that irradiates the reaction solution in the reaction container with irradiation light having a wavelength in the range of 0.65 to 0.75 pm; a photodetector that is disposed at a light-receiving angle of 150 to 350 with respect to the irradiation direction of the irradiation light and is configured to detect scattered light generated from the reaction solution upon irradiation by the light source; and a computer, having a processor and a memory, coupled to the rotating mechanism, light source, and photodetector, the memory storing instructions that when executed by the processor cause the processor to: instruct the rotating mechanism to rotate the reaction container, instruct the photodetector to detect scattered light generated from the reaction solution at a first time and store first detected scattered light data from the photodetector in the memory, instruct the photodetector to detect scattered light generated from the reaction solution at a second time, which is a predetermined amount of time after the first time, and store second scattered light data from the photodetector in the memory, calculate a change in an amount of scattered light data based on the first detected scattered light data and the second detected scattered light data, and determine a concentration of antigen or antibody in the reaction solution in the range of 10 wherein the reaction solution contains the latex particles at a concentration at which the absorbance to irradiation light having a wavelength of 0.7 pm is 0.25 abs to 1.10 abs.