Abstract：Chemical oxygen demand (COD) is a synthetical indicator which represents the degree of organic pollution in water. The near-infrared (NIR) transmission and the UV absorbance method based on photoelectric detection technology and spectroscopy analysis have some advantages such as high precision, speed, non-contact, no secondary pollution etc compared to conventional wet chemical method. The NIR transmission spectra and UV absorbance spectra of standard solution configured with phthalate hydrogen potassium were collected respectively by MPA FTIR spectrometer (Bruker Optics Inc.) made in Germany and AvaSpec-2048-2 UV spectrometer (Avantes Inc.) made in Netherlands. After different pretreatment to the spectra, COD quantitative analysis model was established using partial least squares regression (PLS) and linear regression. The statistical analysis of COD quantitative model was implemented, and the result showed that UV absorbance method had a higher relevance but lower forecast accuracy and precision than NIR transmission method.
Key words：COD;NIR transmission spectra;UV absorbance spectra;Quantitative analysis model
吴国庆，毕卫红*，吕佳明，付广伟 . 近红外透射和紫外吸光度法检测水质化学需氧量的研究[J]. 光谱学与光谱分析, 2011, 31(06): 1486-1489.
WU Guo-qing, BI Wei-hong*, Lü Jia-ming, FU Guang-wei . Determination of Chemical Oxygen Demand in Water Using Near Infrared Transmission and UV Absorbance Method . SPECTROSCOPY AND SPECTRAL ANALYSIS, 2011, 31(06): 1486-1489.
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