Multi-channel photoelectric detection device for dry type chemical analysis

Abstract

The invention discloses a multi-channel photoelectric detection device for dry type chemical analysis, which consists of a light source incidence channel and four photoelectric detection channels. The four photoelectric detection channels comprises a first photoelectric detection channel, a second photoelectric detection channel, a third photoelectric detection channel and a fourth photoelectric detection channel which are symmetrically allocated around the device; a reagent tablet is arranged at one end of the first photoelectric detection channel, a detector is arranged at the other end of the first photoelectric detection channel, and a first converging lens set is arranged at the middle part of the first photoelectric detection channel; and the second, third and fourth photoelectric detection channels, which are respectively provided with a photoelectric detectors and a converging lens set, are structurally identical to the first photoelectric detection channel. According to the device provided by the invention, the four photoelectric detectors at symmetrical positions are used for measuring diffused reflection lights at all positions, thereby overcoming the measuring error caused by uneven diffused reflection lights in different directions and increasing the signal-to-noise ratio and the accuracy of optical measurement, especially dry type chemical measurement.

Description

technical field [0001] The invention relates to a spectrum analysis device, in particular to a multi-channel photoelectric detection device for dry chemical analysis. Background technique [0002] In clinical laboratory analysis, the use of blood, urine or other body fluids for clinical analysis and testing can quickly obtain the results of multiple clinical test items, which is one of the most accurate and direct methods for doctors to diagnose. In the clinical test analysis, the most commonly used wet chemical analysis method currently uses a method called solution chemistry. Typically, instruments using wet chemical analysis are based on colorimetry based on the Lambert-Beer law. This detection method needs to go through the following steps: blood drawing, centrifugation, configuration of reagent solution, and photoelectric detection. The disadvantages of this type of detection method are: reagents need to be stored in liquid form, preparatory work is required for detec...

AI Technical Summary

Problems solved by technology

The disadvantages of this type of detection method are: reagents need to be stored in liquid form, preparatory work is required for detection, whole blood needs to be centrifuged to obtain serum, and the entire detection takes a long time

When performing dry chemical method determination, since the dry chemical reagent sheet of the analyte is usually a reagent sheet with a multilayer film structure, on the one hand, the detected optical signal includes reflected light, refracted light, scattered light and multiple internal reflections. Light, etc., the presence of stray light in the optical signal leads to a low signal-to-noise ratio of photoelectric detection, resulting in low accuracy of the detection results and large fluctuations in repeatability due to the influence of different analytes; on the other hand, dry chemical reagent sheets to be tested The inhomogeneity of the distribution of chemical reagents and sample components in the test area will cause the test results to deviate from the actual results

This makes the current dry chemical analyzers still have a gap in accuracy and precision compared with wet chemical analyzers.

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