The metal material element analyzer is a commonly used analytical instrument, and the intelligent high-speed scientific instrument can better meet the multi-element analysis of materials in the fields of metallurgy, machinery, and chemical industries in front of furnace, finished product, and incoming materials. The technical principle of the metal material element analyzer 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 (colored solution), light absorption occurs. This absorption law can be derived from Lambert-Beer law: When monochromatic light passes through a colored solution, the light intensity transmitted through the solution is not only related to the concentration and thickness of the solution, but also related to the light absorption properties of the solution itself: A = KCL Where A is the extinction value, which is the logarithm of the ratio of the transmitted light intensity I and the emitted light intensity I0 (the reflected light intensity is negligible), that is, A=lg(I0/I); K is the extinction (absorption) coefficient of an elemental solution. The K value of an elemental solution for a certain wavelength (monochromatic light) has a certain value. If the solution concentration is expressed in mol/l and 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 path length, which is the thickness of the solution and is related to the cuvette in this product. Colorimetric analysis of colorimetric instruments is based on Lambert-Beer law. If a standard solution with a known concentration is prepared first, and the standard solution and the measured solution are processed in the same way, and their absorbances are determined by a colorimetric analysis instrument under the same experimental conditions, then As= KsCsLs, in the solution to be tested Ax = KxCxLx, if the same thickness of the cuvette is used to determine the L equal, and use the same wavelength of monochromatic light and the same ambient temperature, then k is equal, that is, As / Ax = Cs/Cx or Cx=(Ax/As)Cs can measure the concentration of the tested solution as long as the absorbance value can be measured. This is the basic principle of colorimetric analysis instrument detection. 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 With a wavelength of 700 nm), the wavelength of the light source of the conventional element analyzer is fixed and cannot be adjusted, and it cannot adapt to the needs of various industries such as metallurgy, foundry, machinery, and chemical industries to detect various elements using new materials. This project is the first in China to adopt a wavelength-adjustable optical system to achieve continuous adjustment of measurement wavelengths, and innovative technologies such as curved-channel cuvettes for analytical components, and multi-byte floating-point logarithmic operations, parameter adjustments, and tracking for regression curve calculations. With the electronic automatic adjustment design, the wavelength of the light source can be continuously adjusted, and the wavelength accuracy is significantly improved (from the past 20 nm to the current 2 nm or less), thereby meeting the needs of users in various industries to detect the content of various elements in different materials. . Nanjing Ningbo Analysis Instrument Co., Ltd. 2016.04.22
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