The principle of metal elemental analysis instrument technology: carbon, sulfur, silicon, manganese, phosphorus, nickel, chromium, copper and other elements in metal materials have an important impact on its performance and quality. This project is an upgraded product of photoelectric colorimeter. The colorimetric instrument's detection principle is a solution containing different elemental components. Intelligent high-speed scientific instruments can better meet the multi-element analysis of materials in the fields of metallurgy, machinery, and chemical industries in front of furnaces, waste products, and incoming materials. This project is an upgraded product of photoelectric colorimeter. The detection principle of the colorimetric analysis instrument is a solution containing different elemental components. The compounds are of different colors and have selective absorption spectra for different wavelengths of light. Therefore, when a fixed wavelength light passes through a solution containing a certain element (a colored solution), light absorption occurs. This absorption rule can be derived from the Lambert-Beer law: When monochromatic light passes through a colored solution, it passes through the solution. Light intensity is not only related to the concentration and thickness of the solution, but also related to the solution's own light absorption properties:

A=KCL

Where A is the extinction value, the logarithm of the ratio of the transmitted light intensity I and the emitted light intensity I0 (the intensity of the reflected light is ignored) ie A=lgI0/I

K is the extinction (absorption) coefficient of an elemental solution, and an elemental solution has a certain value for the K value of a certain wavelength (monochromatic light) incident light. If the solution concentration is expressed in mol/l, the solution thickness is expressed in cm, then the K value at this time is called the molar extinction coefficient;

C is the concentration of the solution, which is related to the content of the element in the solution;

L is the light path, which is the thickness of the solution. This product is related to the cuvette.

The colorimetric analysis method of colorimetric analysis instrument is based on Lambert-Beer's law. If a standard solution with a known concentration is prepared first, and the standard solution and the tested solution are treated in the same way, the same experimental conditions are met after The colorimetric analysis instrument is used to determine the absorbance. In the standard solution, As=KsCsL, in the solution to be tested, Ax=KxCxLx. If the same thickness of the cell is used to make L equal, and use the same wavelength of monochromatic light and the same The ambient temperature, k is also equal, that is, As / Ax = Cs / Cx or Cx = Ax / ACs

This is the basic principle of colorimetric instrument detection. As long as the absorbance value can be measured, the concentration of the tested solution can be measured. >

Due to different elements and different detection and analysis methods, different specific wavelengths are required (such as stannous oxide reduction thiocyanate spectrophotometric determination of molybdenum in steel 520nm; oxalic acid ferrous sulfate silicon molybdenum blue spectrophotometric determination of low silicon in steel The 700nm wavelength of the light source of the conservative element analyzer is fixed and not adjustable, and it cannot adapt to the needs of new materials for detecting various elements in metallurgy, foundry, machinery, and chemical industries. The system realizes the continuous adjustment of the measuring wavelength, the innovative technology of the analysis element adopting the curved colorimetric cup, and the calculation of the regression curve adopts the multi-byte floating point logarithm operation parameter adjustment and tracking adopts the electronic automatic adjustment design, which can realize the wavelength of the light source. Continuously adjustable, and the wavelength accuracy is significantly improved (from the past more than 20nm to now less than 2nm) to meet the needs of users of various industries to detect the content of various elements of different data.