Analytical method of multi-source spectrum fusion water quality

A technology of water quality analysis and spectroscopy, applied in the field of resources and environment, can solve problems such as being easily affected by the environment

Inactive Publication Date: 2009-11-11
ZHEJIANG UNIV
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Problems solved by technology

The disadvantage of the fluorescence analysis method is that it is easily affected by the environment. The fluorescence itself has unstable factors such as quenching, self-absorption, and interna

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  • Analytical method of multi-source spectrum fusion water quality
  • Analytical method of multi-source spectrum fusion water quality
  • Analytical method of multi-source spectrum fusion water quality

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Embodiment Construction

[0054] The water quality analysis object of the present invention is surface water. Due to the variable sampling locations, the composition of water samples and the content of each component also vary greatly with the different pollution conditions. From the perspective of the analysis object, the interference of suspended solids, colloidal substances and inorganic ions in the water sample to be analyzed will seriously affect the analysis accuracy. However, these interferences cannot be physically separated and removed, and have no clear statistical characteristics. They cannot be removed by ordinary filters. Other effective means must be used to reduce the impact of interference. The existing denoising methods either require more prior knowledge, or the setting of the denoising mechanism is unreasonable, and are not suitable for the research object of water quality spectral analysis; and the feature extraction method is not specially designed for signal denoising, and cannot ...

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Abstract

The invention discloses an analytical method of multi-source spectrum fusion water quality. The method takes an ultraviolet/visible absorption spectrum signal and a multi-dimensional fluorescence emission spectrum signal of a water sample to be tested as input, and respectively adopts independent component pretreatment method to extract characteristic signals, remove interference information and obtain characteristic signals of the spectrums. According to the contribution of the characteristic signals of the spectrums to a water quality analyzing model, and aiming at avoiding information hiding, the combined characteristic signal number of the two types of spectrums is determined, the characteristic signals are combined into a spectrum characteristic signal federated data set, and the optimal spectrum configuration combination is solved. Based on an improved support vector machine algorithm, a Boosting method is adopted for modeling, and the optimal spectrum fusion water quality analyzing model is obtained by combining a plurality of modeling results. Based on the spectrum characteristic signal federated data set, the computation model is adopted to compute the comprehensive organic substance pollution index value of the water sample to be tested. The method has the remarkable advantages of high analyzing accuracy, high analysis speed, no pollution of chemical agent, simple operation and maintenance and the like.

Description

technical field [0001] The invention belongs to the technical field of resources and environment and is used for rapid detection of water quality indicators, in particular to a multi-source spectral fusion water quality analysis method. Background technique [0002] Comprehensive organic indicators (such as TOC, COD, BOD, DOC, PAHs and permanganate index) are important national indicators to measure the degree of water pollution. [0003] Traditional chemical analysis methods have a long history, mature technology, high analytical precision and reliable results. However, its shortcomings such as long analysis period, secondary pollution, and the need for professional analysts to operate make this method unusable in the field or without professional analysts, and will cause secondary pollution to the environment. [0004] The comprehensive organic index analysis method of water quality based on spectral analysis has obvious advantages such as no chemical reagent pollution an...

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Application Information

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IPC IPC(8): G01N21/31G01N21/64
Inventor 吴铁军单战虎武晓莉穆海洋李艳君
Owner ZHEJIANG UNIV
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