Water quality multi-index detection method on basis of ultraviolet-visible absorption spectrum

Abstract

The invention relates to a water quality multi-index detection method on the basis of an ultraviolet-visible absorption spectrum. The method comprises the following steps: (1) establishing a water quality algorithm model comprising each water quality index; (2) measuring to obtain the ultraviolet-visible absorption spectrum of the to-be-detected water; (3) calculating to obtain a primary calculation value of each water quality index in the to-be-detected water according to the water quality algorithm model and the ultraviolet-visible absorption spectrum of the to-be-detected water; (4) locally correcting the primary calculation value of each water quality index in the to-be-detected water to obtain a detection result corresponding to each water quality index; and (5) comparing the obtained detection result corresponding to each water quality index and relevant water quality standard of each water quality index, judging whether the to-be-detected water quality exceeds the standard or not and issuing an alarm. By measuring the ultraviolet-visible full-wavelength absorption spectrum of the detected water, combining with the water quality algorithm model and correction parameters, each water quality index in the water can be synchronously calculated. The method can be widely suitable for monitoring and alarming for various kinds of surface water, various kinds of sewage, drinking water, and for control of sewage and water supply treatment processes.

Description

technical field [0001] The invention relates to a water quality standard detection method, in particular to a water quality multi-index detection method based on ultraviolet-visible absorption spectrum. Background technique [0002] Water quality analysis is to measure and evaluate the quality status and change law of water resources, and provide scientific basis for the development, utilization, management and protection of water resources by the country and governments at all levels. The quality of water resources is usually described by water quality indicators, commonly used water quality indicators include COD (Chemical Oxygen Demand, chemical oxygen demand), TOC (Total Organic Carbon, total organic carbon), DOC (Dissolved Organic Carbon, dissolved organic carbon) , BOD (Biochemical Oxygen Demand, biochemical oxygen demand), nitrate nitrogen, nitrite nitrogen, turbidity / suspended solids, chromaticity (color and true color), UV254 (or called SAC254, that is, the waveleng...

AI Technical Summary

Problems solved by technology

However, due to the lack of analytical methods for UV-Vis absorption spectra, this method has not been widely used.

Although there are researches and applications on absorbance measurement based on ultraviolet-visible absorption spectrum, the absorbance of one to two absorption wavelengths is used to analyze and test a water quality index, and it cannot comprehensively reflect the situation of multiple water quality indexes. Therefore, the accuracy of the measurement results is low and the stability is poor, so it cannot be widely used.

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