Reflective photoelectric colorimetric detection method and detection device

Abstract

The invention discloses a reflective photoelectric colorimetric detection method and a detection device thereof. The detection device includes a light collector for collecting reflected light signals of a color test paper dripped with a liquid to be tested under the irradiation of a specific light source and performing photoelectric conversion. and the voltage value after the photoelectric conversion of the daylighting device can be calculated according to the regression equation of the known concentration of the solution and the voltage value after the photoelectric conversion of the reflected light signal of the color test paper dripped with the corresponding concentration of the liquid to be tested under the irradiation of the specific light source The signal processing circuit that produces the concentration of the liquid to be tested, when detecting, drop an appropriate amount of liquid to be tested on the color test paper, and then place the color test paper under a specific light source to detect the voltage value after the photoelectric conversion of the reflected light signal, according to the above regression equation The voltage value is calculated to obtain the concentration of the liquid to be tested. The detection process uses color test paper as the carrier, which combines the portability of test paper and the accuracy and quantification of instrument detection. At the same time, the detection sample is color test paper, which is easy to carry and detect , making on-site detection feasible.

Description

technical field [0001] The invention relates to a detection method and a device for detecting the concentration of a liquid to be tested, in particular to a reflective photoelectric colorimetric detection method and a detection device thereof. Background technique [0002] Colorimetry is a method of determining the concentration of the solution to be tested based on the color reaction that generates colored compounds, and by comparing or measuring the color depth of the colored substance solution. [0003] There are two commonly used colorimetric methods: visual colorimetric method and photoelectric colorimetric method. The photoelectric colorimetric method is to measure the absorbance of a series of standard solutions on a photoelectric colorimeter, plot the absorbance against the concentration, and draw the working curve. Then check its concentration or content on the working curve according to the absorbance of the component solution to be tested. Compared with visual co...

AI Technical Summary

Problems solved by technology

[0004] The existing photoelectric colorimeter is composed of light source, filter, cuvette, photoelectric detector, amplification and display, etc., because the cuvette is used to hold the sample liquid analyzed, so the existing photoelectric colorimeter It can only detect liquid solutions, and cannot detect color test paper. However, collecting liquid solution samples on site is not only difficult to operate, but also requires extremely high equipment, and the existing photoelectric colorimeter is inconvenient to carry. When using it to detect sample liquid Generally, it needs to be carried out in the laboratory, and on-site detection cannot be realized

Images