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Simultaneous Determination Of Multicomponent Concentrations In Blend Cationic Dyes

Jul 31, 2017

               In the printing and dyeing industry, a variety of dye mosaic is very common, and the use of the most color scheme is a three-color dye to spell. Therefore, it is very important to study the concentration of three primary-color dyes and three-color blended dyes. At present, the analysis method of dye is still only in off-line analysis, and the concentration of dye bath is not seen on-line in dyeing process. In this paper, on-line determination of multicomponent dye concentration by combining optical fiber spectrometer and chemometrics, the concentration of multicomponent dyes in the high concentration range was determined by the combination of thin layer chromatography and oblique projection. The main research contents are as follows: (1) The analysis of influencing factors in dyeing process, such as ph value, surfactant, temperature and so on. The results showed that three kinds of influence factors had little effect on the absorbance of dye. By using visible spectrophotometer, the concentration of each pure component dye was prepared by scanning and collecting spectral data, and the standard curve of pure component dyes was plotted.Blend Cationic Dyes

               The experimental results show that: cationic yellow x-8gl, Red X-FG, Blue RL are in 1~10mg/l, 4~40mg/l, 2~20mg/l range of good linearity, the detection limit in turn is 0.0554mg/l, 0.0674mg/l, 0.0596mg/l. (2) A new method of simultaneous determination of the content of three components of cationic yellow X-8GL, red x-fg and brilliant blue RL was established by using Pls method and PCR method for visible spectrophotometric analysis. In the linear range of each dye, the mixed sample dye was prepared according to the uniform test, 26 samples were used as the calibration set, 8 samples were used as the test set, pls and PCR were used to deal with the spectrum data, and the model of mixed cationic dye was established.Blend Cationic Dyes

               Both models have good robustness and precision, and can be used to determine mixed cationic dyes, but Pls method is better than PCR method. (3) The model of Pls method was used to determine the dye concentration in dyeing process. The results of the model prediction were compared with the standard curve method and the two-wavelength method to determine the accuracy and precision of the model. A device for measuring dyes on-line is constructed, and the sample data collected in the dyeing process is modeled in the previous model, which can quickly understand the dyeing conditions in each stage of dyeing process. The results show that the model can predict the concentration in the process of cationic dye dyeing well. (4) The determination of multicomponent dye concentration by thin layer chromatography combined with oblique projection theory. The standard solution of each pure component dye is prepared, the sample point is scanned by multi wavelength thin layer scanning device, the spectral data is collected, the spectral data is transformed, the SKS value of each point is obtained, and the standard curve is made to determine the range of determination of the pure component dyes. The spectral data of a pure component dye is used as the photometric data other spectral data of pure component dyes are used as background spectrum data, the SKS value of each dye in mixed dye solution is calculated by oblique projection operator, and then the concentration of each pure component dye in the mixed dye solution is computed in the standard curve produced in front. The results show that the concentration of cationic dyes can be predicted by thin layer chromatography combined with oblique projection.Blend Cationic Dyes