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Device and method for measuring selenium in water by molecularly imprinted selective laser-induced fluorescence

A laser-induced fluorescence and molecular imprinting technology, applied in the field of environmental chemical monitoring, can solve the problems of long analysis duration, uneven layering, complicated analysis process, etc., and achieve the effect of high-efficiency selective enrichment

Active Publication Date: 2017-06-30
OCEANOGRAPHIC INSTR RES INST SHANDONG ACAD OF SCI
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Problems solved by technology

[0006] The invention provides a device and method for measuring selenium in water by a molecular imprinting selective laser-induced fluorescence method, which can solve the problems existing in the prior art that it cannot work on site, the analysis lasts for a long time, the analysis process is complicated, the conditions are harsh, and the energy consumption is large. cause secondary pollution
Through the innovative design of the fluorescent cell, the problems of low extraction efficiency, uneven layering, large amount of organic solvents, and secondary pollution in existing extraction methods and devices have been solved, and efficient selective enrichment has been achieved. Fluorescent measurement of selenium in water

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  • Device and method for measuring selenium in water by molecularly imprinted selective laser-induced fluorescence
  • Device and method for measuring selenium in water by molecularly imprinted selective laser-induced fluorescence

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Embodiment Construction

[0040] Example 1 of the preparation method of the molecularly imprinted polymer is as follows: acrylamide: 27%, acetic acid: 8%, absolute ethanol: 55%, vinylpyridine: 5%, template molecule : 5%, the sum of the contents of each component is 100%. The template molecule is a complex formed by the chelation of hydroxyethylethylenediaminetriacetic acid and hexavalent selenium in the water body. The above-mentioned components are added into the reactor, stirred and dissolved, and nitrogen gas is used to remove oxygen for 25-35min. Under the protection of nitrogen, heat at 50-60°C, stir and react for 20-40 hours, soak the obtained product in a mixed solution of ethanol and acetic acid for 10-15 hours, remove the template molecules, and dry to obtain hydroxyethylethylenediaminetriacetic acid and water A molecularly imprinted polymer that chelates hexavalent selenium to form a complex.

[0041] Example 2 of the preparation method of the molecularly imprinted polymer is as follows: acr...

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Abstract

The invention provides a device and a method used for measuring selenium in water bodies via molecular imprinting selective laser induced fluorescence. According to the device, a fluorescent pool is designed to be flat; the inner bottom of the fluorescent pool is coated with a molecularly imprinted polymer with absorption capacity on a complex formed from hydroxyethyl ethylenediamine triacetic acid and selenium IV in water bodies. According to the method, the complex is formed from selenium IV in water bodies and hydroxyethyl ethylenediamine triacetic acid, the molecularly imprinted polymer prepared by taking the selenium IV-hydroxyethyl ethylenediamine triacetic acid complex as a template molecule is capable of generating fluorescence at certain wave length under laser light source excitation, fluorescence signal strength and the concentration of selenium in water bodies are linearly associated, high efficiency selective enrichment is realized via molecular imprinting, and the method used for measuring selenium in water bodies is established via laser induced fluorescence method. When the device and the method are used for measuring selenium in water bodies, one-site detection can be realized, detection is rapid and simple, and sensitivity is high.

Description

technical field [0001] The invention relates to the technical field of environmental chemical monitoring, in particular to a method for measuring selenium in water bodies. Background technique [0002] Selenium is not only a toxic element for animals and human body, but also an essential nutrient element. It has been found that endemic cardiomyopathy often occurs in areas with low selenium, and high selenium causes cancer and other diseases, but an appropriate amount of selenium can enhance immunity. Selenium is also a natural antidote for some animals and marine organisms to heavy metals such as Hg, Cu, and Cd. Its toxicity and physiological effects are closely related to its valence and form. Therefore, the research on the analysis method of selenium valence state in seawater has attracted more and more attention of environmental analytical chemists. There are many determination methods for selenium content, such as 3,3-diaminoaniline spectrophotometry, 2,3-diaminonapht...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/64
Inventor 刘东彦张述伟马然褚东志吴宁吴丙伟王茜张颖郭翠莲孔祥峰邹妍张颖颖范萍萍吕靖王昭玉任国兴曹璐曹煊高杨程岩张国华石小梅刘岩侯广利
Owner OCEANOGRAPHIC INSTR RES INST SHANDONG ACAD OF SCI
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