Turbidity compensation method based on Mie scattering theory for water chemical oxygen demand determination by UV-Vis spectrometry

doi:10.1007/s00216-020-03042-4

	Turbidity compensation method based on Mie scattering theory for water chemical oxygen demand determination by UV-Vis spectrometry
	Chen, Xiaowei 2,3; Yin, Gaofang 3; Zhao, Nanjing 1,3; Yang, Ruifang 3; Xia, Meng 2,3; Feng, Chun 2,3; Chen, Yunan 2,3; Dong, Ming 2,3; Zhu, Wei 2,3
刊名	ANALYTICAL AND BIOANALYTICAL CHEMISTRY
	2020-11-11
关键词	Water COD measurement Turbidity compensation Mie scattering theory UV-Vis absorption spectrum
ISSN号	1618-2642
DOI	10.1007/s00216-020-03042-4
通讯作者	Yin, Gaofang(gfyin@aiofm.ac.cn) ; Zhao, Nanjing(njzhao@aiofm.ac.cn)
英文摘要	In view of the problem that chemical oxygen demand (COD) measurement in water using UV-Vis spectrometry was easily affected by turbidity, this paper proposed an analytical method for determining the complex refractive index of particles in water based on Lambert-Beer's law and K-K (Kramers-Kronig) relationship. The obtained complex refractive index was used to establish the turbidity compensation model in the COD characteristic spectral region, and the COD concentration inversion were achieved by using the PLS algorithm. The results show that the turbidity compensation method based on Mie scattering theory can improve the accuracy of COD measurement by UV-Vis spectroscopy. Compared with before turbidity compensation, R-2 (determination coefficient) between true values and predicted values of COD increased from 0.2274 to 0.9629, and RMSE (root mean square error) of predicted values decreased from 21.73 to 3.12 mg L-1. Compared with 350 nm PC, derivative method, and improved MSC method, the turbidity compensation method for COD measurement based on Mie scattering theory is simple, fast, and highly accurate. And the calculated spectrum can represent the scattering characteristics of the measured spectrum. The average relative error between the fitted spectrum and the original normalized spectrum in the 55 mixed solutions was 0.52%, and the maximum relative error was 6.65%. This method can be useful for online COD measurement.
资助项目	National Key Research and Development Plan[2016YFC1400600] ; National Key Research and Development Plan[2017YFF0108402] ; Natural Science Foundation of Anhui Province[1808085MF208] ; Scientific Instruments and Equipments Development Project of Chinese Academy of Sciences[YJKYYQ20190050] ; Natural Science Foundation of China[61805255] ; Natural Science Foundation of China[61378041]
WOS关键词	RAPID-DETERMINATION ; ABSORPTION ; QUALITY ; COD
WOS研究方向	Biochemistry & Molecular Biology ; Chemistry
语种	英语
出版者	SPRINGER HEIDELBERG
WOS记录号	WOS:000588611300001
资助机构	National Key Research and Development Plan ; Natural Science Foundation of Anhui Province ; Scientific Instruments and Equipments Development Project of Chinese Academy of Sciences ; Natural Science Foundation of China
内容类型	期刊论文
源URL	[http://ir.hfcas.ac.cn:8080/handle/334002/105166]
专题	中国科学院合肥物质科学研究院
通讯作者	Yin, Gaofang; Zhao, Nanjing
作者单位	1.Anhui Univ, Inst Phys Sci & Informat Technol, Hefei 230601, Anhui, Peoples R China 2.Univ Sci & Technol China, Hefei 230026, Anhui, Peoples R China 3.Chinese Acad Sci, Key Lab Environm Opt & Technol, Anhui Inst Opt & Fine Mech, 350 Shushanhu Rd, Hefei 230031, Anhui, Peoples R China
推荐引用方式 GB/T 7714	Chen, Xiaowei,Yin, Gaofang,Zhao, Nanjing,et al. Turbidity compensation method based on Mie scattering theory for water chemical oxygen demand determination by UV-Vis spectrometry[J]. ANALYTICAL AND BIOANALYTICAL CHEMISTRY,2020.
APA	Chen, Xiaowei.,Yin, Gaofang.,Zhao, Nanjing.,Yang, Ruifang.,Xia, Meng.,...&Zhu, Wei.(2020).Turbidity compensation method based on Mie scattering theory for water chemical oxygen demand determination by UV-Vis spectrometry.ANALYTICAL AND BIOANALYTICAL CHEMISTRY.
MLA	Chen, Xiaowei,et al."Turbidity compensation method based on Mie scattering theory for water chemical oxygen demand determination by UV-Vis spectrometry".ANALYTICAL AND BIOANALYTICAL CHEMISTRY (2020).