Method for Determining the Source of Colored Soluble Organic Compounds Based on Fluorescence Spectrum Integral Ratio

Abstract

The invention provides a method for judging the source of a colored soluble organic matter based on a fluorescence-spectrum integral specific value. After a three-dimensional fluorescence spectrum of the colored soluble organic matter in a lake is measured, the source of the colored soluble organic matter is distinguished by utilizing the specific value IC to IT between a peak-C spectrum integral value of humic acid and a peak-T spectrum integral value of similar tryptophan; when the IC to IT is less than 5, the source of the colored soluble organic matter is an endogenous dominant; when the IC to IT is not less than 5 but not more than 20, the source of the colored soluble organic matter is an exogenous dominant; when the IC to IT is more than 20, the source of the colored soluble organic matter is an intensive exogenous effect. By using the method provided by the invention, the addition of a chemical reagent is not needed; the carrying out of fussy complicated calculations of the measurement of a conventional chemical index, the parallel factor analysis of a three-dimensional fluorescent component, and the like, is also not needed; the measurement of the fluorescence intensity, in several common waveband ranges, of the colored soluble organic matter is only needed; thus, the quick evaluation and division of the source of the colored soluble organic matter in an inland water body can be realized; the operability is high; the method is easy to popularize and is compared with peer research results at home and abroad; meanwhile, the fluorescence spectrum is easily modified to form an on-line or in-situ monitoring fluorescent probe; therefore, the method has important and high application value.

Description

technical field [0001] The invention belongs to the technical field of environmental monitoring and is mainly used to determine the source of dissolved organic matter. Specifically, it develops a method based on the integral ratio I of humic acid-like C peak and tryptophan-like T peak in the three-dimensional fluorescence spectrum region. C :I T Carry out methods for determining the source of colored soluble organic matter in inland water bodies. Background technique [0002] Dissolved organic matter (DOM) is usually accompanied by a large amount of CO in the process of migration and transformation, especially in the process of microbial degradation and photodegradation. 2 release. Dissolved organic matter in inland waters as CO 2 An important source of , and its migration and transformation rules need to be studied. There is still little research on how DOM migration and transformation processes affect the inland water carbon cycle and atmospheric carbon dioxide. The o...

AI Technical Summary

Problems solved by technology

Although parallel factor analysis technology can analyze 3D fluorescence data more effectively than any previous method, however, the molecular components of parallel factors analyzed from 3D fluorescence samples collected in different environments are different, so it is difficult to analyze the 3D fluorescence data in different ecological environments. Fluorescence spectra for comparison

Moreover, the parallel factor analysis model often requires professionals to carry out a large amount of data analysis and calculation, which limits the judgment of ordinary people on the source of CDOM

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