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Correcting method for reducing influence of soil particle size upon polycyclic aromatic hydrocarbon working curve

A technology of polycyclic aromatic hydrocarbons and correction methods, which is applied in the detection field, can solve problems affecting the fluorescence intensity of PAHs, and achieve an effective correction effect

Active Publication Date: 2017-02-22
TIANJIN AGRICULTURE COLLEGE
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Problems solved by technology

However, during the research process, it was found that the soil particle size seriously affects the fluorescence intensity of PAHs, which is undoubtedly a challenge for the development of rapid real-time detection technology of soil polycyclic aromatic hydrocarbons by fluorescence spectroscopy

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  • Correcting method for reducing influence of soil particle size upon polycyclic aromatic hydrocarbon working curve

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[0030] Polycyclic aromatic hydrocarbons are hydrocarbons containing two or more benzene rings in their molecules, including more than 150 compounds such as naphthalene, anthracene, phenanthrene, and pyrene. The correction method of the present invention will be described in detail below with reference to the accompanying drawings, taking anthracene as an example.

[0031] Anthracene was analytically pure and purchased from Tianjin Sino Biochemical Technology Co., Ltd.; the fluorescence spectrum was collected using a LS-55 fluorescence spectrophotometer produced by PE Company in the United States. sheet base). The wavelength of the excitation light source is 304nm, the emission wavelength range of the fluorescence spectrum is 220-700nm, the slit widths of the excitation and emission monochromators are 5nm and 3nm respectively, and the scanning rate is 1000nm / min.

[0032] In the specific embodiment of the present invention, the soil is collected from the campus of Tianjin Agric...

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Abstract

The invention discloses a correcting method for reducing influence of soil particle size upon a polycyclic aromatic hydrocarbon working curve, comprising the steps of screening soil with a screening device, dividing into N parts after screening, adding a polycyclic aromatic hydrocarbon into each part of soil, and mixing well to obtain N polycyclic aromatic hydrocarbon soils having different concentrations of polycyclic aromatic hydrocarbon; exciting polycyclic aromatic hydrocarbon soils with an excitation light source to obtain fluorescent spectra of the polycyclic aromatic hydrocarbon soils, and determining quantitative absorption bands A and Rayleigh scattering absorption bands B; extracting fluorescent intensities of the quantitative absorption bands A of the polycyclic aromatic hydrocarbon soils to obtain quantitative absorption intensities; extracting scattering intensities of the Rayleigh scattering absorption bands B of the polycyclic aromatic hydrocarbon soils to obtain Rayleigh scattering intensities; correcting the quantitative absorption intensities to obtain corrected fluorescent intensities Fs; establishing a corrected working curve according to Fs and concentration C. The correcting method can provide quick and effective correction for the influence of soil particle size upon polycyclic aromatic hydrocarbon working curves.

Description

technical field [0001] The invention belongs to the field of detection methods, and in particular relates to a correction method for reducing the influence of soil particle size on the working curve of polycyclic aromatic hydrocarbons. Background technique [0002] On May 31, 2016, the State Council issued the Action Plan for the Prevention and Control of Soil Pollution, which pointed out that by 2020, the increasing trend of soil pollution across the country will be initially curbed. Polycyclic aromatic hydrocarbons (PAHs) are ubiquitous in the environment. Many PAHs are carcinogenic, teratogenic, mutagenic, and bioaccumulative, and can remain in the environment for a long time. Therefore, many countries have used PAHs as air pollutants. and soil pollution detection objects. As an important environmental medium, soil bears more than 90% of the environmental load of PAHs, so the pollution of PAHs to soil is particularly prominent. In recent years, domestic scholars have co...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/64G01N21/49
CPCG01N21/49G01N21/64G01N2021/6419
Inventor 杨仁杰刘海学艾成果孙雪杉董桂梅杨延荣单慧勇张伟玉
Owner TIANJIN AGRICULTURE COLLEGE
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