Quantitative analysis of ammonium salts in coking industrial liquid waste treatment process based on Raman spectroscopy
Cao Ya-Nan1, 2, Wang Gui-Shi1, †, 
, Tan Tu1, ‡, , Cai Ting-Dong3, Liu Kun1, Wang Lei1, Zhu Gong-Dong1, Mei Jiao-Xu1
, Tan Tu1, ‡, , Cai Ting-Dong3, Liu Kun1, Wang Lei1, Zhu Gong-Dong1, Mei Jiao-Xu1 Data preprocessing results for a sample: (a) spectra results after background removal, comparison between wavelet denoised results and raw spectra data (inlet). (b) Continuous wavelet transform (CWT) coefficients for the denoised spectra signal. (c) The 1st derivative results of the denoised spectra signal.
