Langergraber G, Fleischmann N, Hofstädter F
Department for Sanitary Engineering and Water Pollution Control (IWGA-SIG), University of Agricultural Sciences Vienna (BOKU), Muthgasse 18, A-1190 Vienna, Austria.
Water Sci Technol. 2003;47(2):63-71.
A submersible UV/VIS spectrometer for in-situ real-time measurements is presented. It utilises the UV/VIS range (200-750 nm) for simultaneous measurement of COD, filtered COD, TSS and nitrate with just a single instrument. A global calibration is provided that is valid for typical municipal wastewater compositions. Usually high correlation coefficients can be achieved using this standard setting. By running a local calibration improvements concerning trueness, precision and long term stability of the results can be achieved. The calibration model is built by means of PLS, various validation procedures and outlier tests to reach both high correlation quality and robustness. This paper describes the UV/VIS spectrometer and the calibration procedure.
本文介绍了一种用于现场实时测量的潜水式紫外可见光谱仪。它利用紫外可见光谱范围（200 - 750纳米），仅用一台仪器就能同时测量化学需氧量（COD）、过滤后的化学需氧量、总悬浮物（TSS）和硝酸盐。提供了一种适用于典型城市污水成分的全局校准。使用此标准设置通常可以获得较高的相关系数。通过进行局部校准，可以提高结果的准确性、精密度和长期稳定性。校准模型通过偏最小二乘法（PLS）、各种验证程序和异常值测试构建，以实现高相关质量和稳健性。本文描述了紫外可见光谱仪和校准程序。
