Determination of Dyeing Wastewater by Snapshot Imaging Spectrometer

A rapid detection method for dyeing wastewater by snapshot imaging spectrometer was developed. The simulated dyeing wastewater solution of a single component and mixed components was prepared and the experimental conditions were optimized. The white LED array was used as the detection light source and the image of the sample was collected by the imaging spectrometer developed in the laboratory to obtain the spectral information of the sample in the range of 400-800 nm. The standard curve between the absorbance and the concentration of the samples was established. The linear range of a single component of Rhodamine B or Orange G was 1-50 mg/L, the linear correlation coefficients was more than 0.99, the recoveries were 93%-114% and the relative standard deviations (RSD) were 7.5% and 1.3%. The correlation coefficients between predicted concentration and reference concentration reached 0.999 in the detection of mixed component by using the multiple linear regression model, and the relative errors of 3 predicted samples were reduced. The rapid, accurate and precise method showed an excellent promise for on-site and emergency detection of dyeing wastewater.