Determination of chemical oxygen demand in water using near-infrared transmission and UV absorbance method

2011 ◽  
Vol 9 (s1) ◽  
pp. s10705-310709 ◽  
Author(s):  
Guoqing Wu Guoqing Wu ◽  
Weihong Bi Weihong Bi ◽  
Jiaming Lv Jiaming Lv ◽  
Guangwei Fu Guangwei Fu
Keyword(s):  
Chemical Oxygen Demand ◽  
Near Infrared ◽  
Oxygen Demand ◽  
Uv Absorbance ◽  
Infrared Transmission

A rapid determination method for chemical oxygen demand in aquaculture wastewater using the ultraviolet absorbance spectrum and chemometrics

2014 ◽  
Vol 6 (11) ◽  
pp. 3799-3803 ◽  
Author(s):  
Hong Cao ◽  
Wentai Qu ◽  
Xianglong Yang
Keyword(s):  
Chemical Oxygen Demand ◽  
Rapid Determination ◽  
Oxygen Demand ◽  
Uv Absorbance ◽  
Determination Method ◽  
Absorbance Spectrum ◽  
Fast Determination ◽  
Ultraviolet Absorbance ◽  
Aquaculture Wastewater

The ultraviolet (UV) absorbance spectrum was studied for the fast determination of chemical oxygen demand (COD) in aquaculture wastewater.

Determination of Chemical Oxygen Demand in Domestic Wastewater by near Infrared Spectrometry of Seston and Partial Least Squares Calibration

NIR news ◽  
2008 ◽  
Vol 19 (1) ◽  
pp. 8-9 ◽  
Author(s):  
Antonio C. Sousa ◽  
Maria Monica L.M. Lucio ◽  
Ovídeo F. Bezerra Neto ◽  
Glauciene P.S. Marcone ◽  
Alessandra F.C. Pereira ◽  
...  
Keyword(s):  
Chemical Oxygen Demand ◽  
Least Squares ◽  
Partial Least Squares ◽  
Near Infrared ◽  
Oxygen Demand ◽  
Domestic Wastewater ◽  
Infrared Spectrometry ◽  
Near Infrared Spectrometry

Rapid Determination of Chemical Oxygen Demand in Sugar Refinery Wastewater by Short-Wave Near-Infrared Spectroscopy

2012 ◽  
Vol 549 ◽  
pp. 167-171 ◽  
Author(s):  
Tao Pan ◽  
Zeng Hai Chen
Keyword(s):  
Chemical Oxygen Demand ◽  
Near Infrared ◽  
Rapid Determination ◽  
Oxygen Demand ◽  
Short Wave ◽  
Good Prediction ◽  
Refinery Wastewater ◽  
Analysis Model ◽  
Sugar Refinery

Near-infrared (NIR) spectroscopy combined with partial least squares (PLS) regression and Savitzky-Golay (SG) smoothing was successfully applied for the rapid no-reagent determination of chemical oxygen demand (COD) in sugar refinery wastewater. Among 141 samples, 60 were randomly selected as the validation set. The remaining 81 samples were divided into the calibration set (50 samples) and the prediction set (31 samples) for a total of 20 times with certain similarities. The results showed that the short-wave NIR region (780 nm to 1100 nm) can be used as information waveband of COD in sugar refinery wastewater. The optimal SG smoothing parameters and PLS factors OD, DP, NSP, and F were 5, 5, 7, and 6, respectively. The modeling effects M-SEPAve, M-RP,Ave, M-SEPStd, and M-RP,Stdwere 24.3 mg/L, 0.971, 2.7 mg/L, and 0.007, respectively. The validation effects V-SEP and V-RP were 25.9 mg/L and 0.963, respectively. The results indicated that the method has good prediction effect and stability, and provided a reliable analysis model and valuable references for designing specialized instruments.

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