Share Email Print
cover

Proceedings Paper

An instrument for on-line chemical oxygen demand and nitrate in water monitoring
Author(s): Wei-Wei Feng; Dan Li; Zong-Qi Cai; Yong-Chun Zhang; Xiao Xu
Format Member Price Non-Member Price
PDF $14.40 $18.00

Paper Abstract

Chemical Oxygen Demand (COD) and Nitrate concentration data are of vital importance in coastal water quality monitoring. The traditional method for monitoring these two parameters is a chemical method that consumes chemical reagent. The drawbacks of these chemical methods are the waste they generate, and the difficulty in implementing in-situ long term monitoring. A new instrument based on an optical method to measure Chemical Oxygen Demand and Nitrate concentration without reagent is described in this paper. According to the different water quality, optical path length of flow cell is variable in this system. A 10 mm path length is selected in this paper. And a Y type of structure of quartz optical fibers is used for real-time compensation. Concentration calculation principle is based on the analysis of absorption spectrum and partial least square method. Comparison between model calculation and experimental data is also discussed in detail with several test samples. The implementation of standard test and measurements for the collected water samples is presented in this paper.

Paper Details

Date Published: 4 November 2016
PDF: 10 pages
Proc. SPIE 10026, Real-time Photonic Measurements, Data Management, and Processing II, 1002611 (4 November 2016); doi: 10.1117/12.2245301
Show Author Affiliations
Wei-Wei Feng, Yantai Institute of Coastal Zone Research (China)
Univ. of Chinese Academy of Sciences (China)
Dan Li, Yantai Institute of Coastal Zone Research (China)
Zong-Qi Cai, Yantai Institute of Coastal Zone Research (China)
Yong-Chun Zhang, Yantai Institute of Coastal Zone Research (China)
Xiao Xu, Yantai Institute of Coastal Zone Research (China)


Published in SPIE Proceedings Vol. 10026:
Real-time Photonic Measurements, Data Management, and Processing II
Ming Li; Bahram Jalali; Keisuke Goda; Kevin K. Tsia, Editor(s)

© SPIE. Terms of Use
Back to Top