Quantitative analysis of ammonium salts in coking industrial liquid waste treatment process based on Raman spectroscopy

Cao Ya-Nan^{1, 2}, Wang Gui-Shi^{1, †,}, Tan Tu^{1, ‡,}, Cai Ting-Dong³, Liu Kun¹, Wang Lei¹, Zhu Gong-Dong¹, Mei Jiao-Xu¹

Spectra of the calibration samples and their characteristic bands, (NH₄SCN i and ii, (NH₄)₂S₂O₃ I–V, water vapor 1 and 2).