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

曹亚南  王贵师  谈图  蔡廷栋  刘锟  汪磊  朱公栋  梅教旭  
【摘要】:Quantitative analysis of ammonium salts in the process of coking industrial liquid waste treatment is successfully performed based on a compact Raman spectrometer combined with partial least square(PLS) method. Two main components(NH_4SCN and(NH_4)_2S_2O_3) of the industrial mixture are investigated. During the data preprocessing, wavelet denoising and an internal standard normalization method are employed to improve the predicting ability of PLS models. Moreover,the PLS models with different characteristic bands for each component are studied to choose a best resolution. The internal and external calibration results of the validated model show a mass percentage error below 1% for both components.Finally, the repeatabilities and reproducibilities of Raman and reference titration measurements are also discussed.

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