Multichannel Multicomponent Solution Concentration Detection Method based on Dual Wavelength Spectrophotometry

Yang Xu, Weiping Luo

School of Mechanical Engineering and Automation, Wuhan Textile University, Wuhan, 430200, China

Abstract: The traditional method based on stoichiometric spectrophotometry for the detection of the concentration of dye solution components cannot accurately detect the components with similar spectrum ｏｒ low concentration at the same time, resulting in a low concentration range for accurate detection. In order to solve the above problems, a multichannel multicomponent solution concentration detection method based on dual wavelength spectrophotometry was studied. A spectrum detection device composed of optical fiber probe and CCD array detector is arranged and optical path calibration is carried out on the device. After processing the spectral data, the multi-channel detection of multi-component concentration was realized by using support vector machine. Compared with the two traditional methods, the experimental results show that the detection method based on dual-wavelength spectrophotometry can effectively remove interference, improve the detection range of concentration, and the detection error is within 0.3%.

Keywords: Dual wavelength spectrophotometry; Multi-component dye solution; Concentration detection; Support vector machine