Comparison of three optimized digestion methods for rapid determination of chemical oxygen demand: Closed microwaves, open microwaves and ultrasound irradiation

2006 ◽  
Vol 561 (1-2) ◽  
pp. 210-217 ◽  
Author(s):  
Claudia E. Domini ◽  
Montserrat Hidalgo ◽  
Frank Marken ◽  
Antonio Canals
Keyword(s):  
Chemical Oxygen Demand ◽  
Rapid Determination ◽  
Oxygen Demand ◽  
Ultrasound Irradiation ◽  
Digestion Methods

FTIR/ATR Spectroscopy Applied to the Rapid Determination of Chemical Oxygen Demand of Wastewater

2012 ◽  
Vol 500 ◽  
pp. 820-825 ◽  
Author(s):  
Tao Pan ◽  
Qiang Ji ◽  
Jie Mei Chen ◽  
Hua Zhou Chen
Keyword(s):  
Chemical Oxygen Demand ◽  
Mean Squared Error ◽  
Rapid Determination ◽  
Signal To Noise Ratio ◽  
Oxygen Demand ◽  
Attenuated Total Reflection ◽  
Optimal Model ◽  
Squared Error ◽  
Atr Spectroscopy

A directly rapid quantification method for chemical oxygen demand (COD) of wastewater was established by Fourier transform infrared (FTIR) spectroscopy combined with attenuated total reflection (ATR) technology and moving window partial least squares (MWPLS) method with changeable parameters. All samples were firstly divided into the calibration set and the prediction set. And then according to the predicion effect, the optimal model was selected, and the corresponding waveband, number of adopted wavenumbers, PLS factor, root mean squared error of predication (RMSEP), correlation coefficient of predication (RP) were 3152-1109 cm-1, 1060, 8, 21.5 mg/L, and 0.981 respectively, which was obviously superior to the optimal PLS model on the whole spectral collecting region. The result shows that FTIR/ATR spectroscopy can be applied to the rapid determination of COD of wastewater, and the waveband selected by MWPLS method with changeable parameters has higher signal to noise ratio, which can effectively improve the precision of the predictive model.

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.

scholarly journals Rapid Determination of the Chemical Oxygen Demand of Water Using a Thermal Biosensor

Sensors ◽  
2014 ◽  
Vol 14 (6) ◽  
pp. 9949-9960 ◽  
Author(s):  
Na Yao ◽  
Jinqi Wang ◽  
Yikai Zhou
Keyword(s):  
Chemical Oxygen Demand ◽  
Rapid Determination ◽  
Oxygen Demand

An environment-friendly device for rapid determination of chemical oxygen demand in waters based on ozone-induced chemiluminescence technology

2019 ◽  
Vol 11 (12) ◽  
pp. 1707-1714
Author(s):  
Youquan Zhao ◽  
Junpeng Zhou ◽  
Yang Song ◽  
Zhende Li ◽  
Xiao Liu ◽  
...  
Keyword(s):  
Chemical Oxygen Demand ◽  
Rapid Determination ◽  
Oxygen Demand ◽  
Environment Friendly ◽  
Rapid Measurement

An environment-friendly device was developed and optimized for the rapid measurement of chemical oxygen demand (COD) in waters.

Rapid Determination of the Chemical Oxygen Demand in Water with the Use of High-Temperature Solid-Electrolyte Cells

2004 ◽  
Vol 59 (2) ◽  
pp. 163-167 ◽  
Author(s):  
B. K. Zuev ◽  
A. A. Korotkov ◽  
V. G. Filonenko ◽  
A. N. Mashkovtsev ◽  
V. P. Zvolinskii
Keyword(s):  
High Temperature ◽  
Chemical Oxygen Demand ◽  
Solid Electrolyte ◽  
Rapid Determination ◽  
Oxygen Demand ◽  
Solid Electrolyte Cells
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