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Fluorescence detection method of pyridyl quaternary ammonium salt cationic surfactant, and its application

A technology of surfactant and pyridine quaternary ammonium salt, which is applied in fluorescence/phosphorescence, material excitation analysis, etc., can solve the problems of cumbersome operation, long time-consuming, high detection limit, etc., and achieve good spectral performance, wide sources, and high solubility. Effect

Inactive Publication Date: 2014-03-26
QIQIHAR UNIVERSITY
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Problems solved by technology

[0007] However, although the existing methods can detect cationic surfactants or anionic surfactants in aqueous solution, the detection methods lack single selectivity, narrow detection linear range, high detection limit, high cost, long time-consuming, and difficult to operate. Disadvantages such as cumbersomeness, lack of reproducibility, and signal stability

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  • Fluorescence detection method of pyridyl quaternary ammonium salt cationic surfactant, and its application
  • Fluorescence detection method of pyridyl quaternary ammonium salt cationic surfactant, and its application
  • Fluorescence detection method of pyridyl quaternary ammonium salt cationic surfactant, and its application

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specific Embodiment approach 1

[0029] Embodiment one: the fluorescence detection method of the pyridinium quaternary ammonium salt cationic surfactant (RPB) of the present embodiment is carried out according to the following steps:

[0030] 1. Configure the detection solution: add the fluorescent dye CXT, non-ionic surfactant and buffer solution into the water, adjust the pH value to pH 5-12 after mixing evenly, and obtain the detection solution; the molar concentration of CXT in the detection solution 1.0×10 -6 ~1.0×10 -3 mol / L; the nonionic surfactant in the detection solution is Brij35, and its molar concentration is 1.0×10 -5 ~1.0×10 -2 mol / L; the buffer solution in the detection solution is Tris-HCl or Hepes, and its molar concentration is 0.1×10 -3 ~2.0×10 -2 mol / L.

[0031] 2. The single selectivity of RPB: Add various common surfactants respectively to the solution of step 1. When the concentration of surfactant is 1 to 6 times of the concentration of CXT, measure its fluorescence intensity (ex...

specific Embodiment approach 2

[0045] Embodiment 2: This embodiment differs from Embodiment 1 in that: after mixing uniformly in Step 1, use HCl solution or NaOH solution to adjust the pH value of the detection solution obtained in Step 1 to pH 8. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0046] Specific embodiment three: the difference between this embodiment and one of the specific embodiments one to two is: the molar concentration of CXT in the detection solution described in step one is 5.0×10 -6 . Others are the same as one of the specific embodiments 1 to 2.

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Abstract

The invention relates to a fluorescence detection method of a pyridyl quaternary ammonium salt cationic surfactant, and its application, and also relates to a fluorescence detection agent of the pyridyl quaternary ammonium salt cationic surfactant, and its application. The fluorescence detection agent of the pyridyl quaternary ammonium salt cationic surfactant has the advantages of wide linear detection range, low detection limit, low cost and rapidness. The structural formula of the pyridyl quaternary ammonium salt cationic surfactant is shown in the specification; and in the structural formula, R is CnH2n+1, or CnH2n+1NCOCH2, n is 8-18, X<-> is Cl<->, Br<-> or I<->. The method and the agent can be used for detecting the pyridyl quaternary ammonium salt cationic surfactant in practical environment water samples, such as surface water, lake water and municipal sewage.

Description

technical field [0001] The invention relates to a fluorescence detection method and application of a pyridinium quaternary ammonium salt cationic surfactant. Background technique [0002] Quaternary ammonium salt-type cationic surfactants are cationic surfactants with high output and wide application. Among them, the typical and most common type is pyridinium quaternary ammonium salt cationic surfactant, the molecule of alkyl pyridinium quaternary ammonium salt (RPB) The structural formula is as follows: [0003] [0004] R=C n h 2n+1 , or C n h 2n+1 NCOCH 2 ,n=8-18;X - = Cl - ,Br - ,I - ; Because of its good water solubility, both acid and alkali resistance and strong bactericidal effect, it is widely used in industrial production and daily products, and will eventually be released into the environment, causing environmental problems. Therefore, establishing a new detection method for pyridinium quaternary ammonium salt cationic surfactant has special significa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/64
Inventor 郭祥峰贾丽华张莹莹
Owner QIQIHAR UNIVERSITY
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