Method for Simultaneous Detection of Particulate Organic Matter and Dissolved Organic Matter in Water Body

Abstract

The invention provides a method for simultaneously detecting particulate organics and dissolved organics in water body, comprising the following steps: firstly, collecting water body samples and setting an excitation wavelength, an emission wavelength and a scanning speed of a fluorescence spectrophotometer; secondly, determining excitation-emission three-dimensional fluorescence spectrums of all samples and ultrapure water; thirdly, subjecting the three-dimensional fluorescence spectrums of the samples to raman scattering correction by using the three-dimensional fluorescence spectrum of the ultrapure water; fourthly, exporting a data matrix of the three-dimensional fluorescence spectrums obtained by the raman scattering correction for data conversion; fifthly, subjecting data obtained after the data conversion of all samples to principal component analysis; sixthly, identifying components of organics in water by utilizing a factor score matrix graph which is drawn from a factor score coefficient matrix through conversion; seventhly, calculating relative content of the particulate organics and the dissolved organics in the water body based on principal component analyzing results. The method provided by the invention has the advantages of little demand for samples, high detection sensitivity, no damage to sample structure and environmental protection.

Description

technical field [0001] The invention relates to the field of environmental science and detection technology, in particular to a method for simultaneously detecting granular organic matter and dissolved organic matter in a water body. Background technique [0002] With the rapid development of industry and agriculture in the world, the substandard discharge of industrial wastewater, the random dumping of domestic sewage and the unreasonable application of agricultural chemical fertilizers in agricultural production have caused serious organic pollution to water bodies in many areas, which has caused serious damage to the regional ecological environment and nearby residents. serious health hazard. In order to effectively and accurately eliminate such hidden dangers, it is first necessary to clarify the degree of pollution of the polluted water body and its complete pollutant composition information. [0003] At present, the detection and analysis of organic matter in water is...

AI Technical Summary

Problems solved by technology

[0003] At present, the detection and analysis of organic matter in water is mainly carried out by using chromatographic and spectroscopic techniques, but the samples tested in chromatographic analysis must be pre-treated to remove particles before they can be detected and analyzed by detectors; in order to reduce particles in water during spectral analysis Generally, the samples need to be filtered to reduce the scattering interference caused by particles. Therefore, the detection and analysis of organic matter in water is mainly soluble organic matter, and the detection and analysis of granular organic matter is neglected. Therefore, it is necessary to find a method that can simultaneously identify and analyze The method of analyzing organic substances with different particle sizes and their relative content in water bodies will provide a scientific basis for comprehensively grasping the pollution status and behavior of organic substances in water bodies

Images