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Fluorescent detection reagent and detection method for dichlorinated-1, 1'-dimethyl-4, 4'-dipyridyl

A fluorescence detection and dimethyl technology, applied in chemical instruments and methods, fluorescence/phosphorescence, luminescent materials, etc., can solve the problems of cumbersome operation and difficulty in obtaining detection substances, and achieve high sensitivity, strong practical value, and safe use Effect

Inactive Publication Date: 2014-07-30
QIQIHAR UNIVERSITY
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Problems solved by technology

[0008] The present invention aims to solve the technical problems that the detection substances in the existing fluorescent detection method for paraquat are difficult to obtain and the operation is cumbersome, and provides a dichloride-1,1'-dimethyl-4,4'- Fluorescence detection reagent and detection method of bipyridine

Method used

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  • Fluorescent detection reagent and detection method for dichlorinated-1, 1'-dimethyl-4, 4'-dipyridyl
  • Fluorescent detection reagent and detection method for dichlorinated-1, 1'-dimethyl-4, 4'-dipyridyl
  • Fluorescent detection reagent and detection method for dichlorinated-1, 1'-dimethyl-4, 4'-dipyridyl

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specific Embodiment approach 1

[0030] Specific Embodiment 1: A fluorescent detection reagent for 1,1'-dimethyl-4,4'-bipyridine dichloride in this embodiment uses the fluorescent dye CXT as the fluorescent molecular probe.

[0031] The fluorescent dye CXT described in this embodiment has a chemical name of 4,4'-bis[(4-hydroxyethylamino-6-anilino-1,3,5-triazin-2-yl)amino] -Sodium stilbene-2,2'-disulfonate, the molecular structure of which is shown in Formula 1 below.

[0032]

specific Embodiment approach 2

[0033] Specific embodiment two: The fluorescence detection reagent of dichloro-1,1'-dimethyl-4,4'-bipyridyl in this embodiment is composed of fluorescent dye CXT and a buffer solution, wherein the buffer solution is water It is prepared from a solvent, and the pH value of the buffer solution is 5-7.

specific Embodiment approach 3

[0034] Specific embodiment three: the difference between this embodiment and specific embodiment two is that the buffer solution is acetic acid-sodium acetate buffer solution, disodium hydrogen phosphate-citric acid buffer solution, disodium hydrogen phosphate-sodium dihydrogen phosphate buffer solution or hydrogen phosphate Dipotassium-sodium hydroxide buffer solution. Others are the same as in the second embodiment.

[0035] Since the method needs to be carried out in a weakly acidic solution, the pH of the solution needs to be controlled, so a buffer solution is needed to stabilize the pH value and ensure the stability of the pH value of the solution.

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Abstract

The invention relates to a fluorescent detection reagent and a detection method for dichlorinated-1, 1'-dimethyl-4, 4'-dipyridyl, relating to a fluorescent detection reagent and method for a dipyridyl herbicide and aiming to solve the technical problems of difficulty in obtaining detection substances and complex operation in the traditional fluorescent detection method for paraquat. A fluorescent dye CXT is used as a fluorescent molecular probe in the reagent provided by the invention. The reagent is a liquid composed of water, a buffer liquid and the fluorescent dye CXT. Qualitative detection is realized through judging whether fluorescence quenching of CXT appears before and after the fluorescent detection reagent is added into a sample to be tested; and quantitative detection is realized by using a standard curve method. According to the invention, the fluorescent dye CXT is used as the fluorescent molecular probe, so that the fluorescent detection reagent can be used for detecting a DBPD herbicide in an actual environmental water sample such as lake water, sewage and the like.

Description

technical field [0001] The invention relates to a fluorescent detection reagent and method for a bipyridine herbicide. Background technique [0002] Herbicides have a great impact on the environment and human health, and their variety and large output have always been a hot spot of concern. Among them, the more typical bipyridine herbicides are paraquat (DBPD), also known as Kewuzong and Quaiquat. The chemical name is l, 1-dimethyl 4, 4-bipyridine cationic salt, and its molecular formula is C 12 h 14 N 2 , whose structural formula is: [0003] [0004] The herbicide is easily soluble in water, easily hydrolyzed under alkaline conditions, stable in acidic and neutral solutions, has strong herbicidal performance, is widely used in agricultural production, and will eventually be released into the environment, causing environmental problems . [0005] Existing detection methods for paraquat include ultraviolet spectrophotometry, high performance liquid chromatography, ch...

Claims

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Application Information

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IPC IPC(8): C09K11/06G01N21/64
Inventor 郭祥峰贾丽华黄凤婷杨瑞张宇
Owner QIQIHAR UNIVERSITY
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