Method for detecting melamine through solid-state electrochemiluminescence

A technology for detection of melamine and luminescence, which is applied in the direction of chemiluminescence/bioluminescence, and analysis through chemical reactions of materials, can solve the problems of high detection cost, high price, inconvenience of melamine, etc., and achieve wide linear range, high sensitivity, The effect of reducing inspection costs

Inactive Publication Date: 2013-01-02
SHANGHAI NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, when using solution-phase ruthenium terpyridyl electrochemiluminescence to detect analytes, it is necessary to continuously add ruthenium terpyridyl to the reaction system. Due to its high price, the detection cost is quite high, which li

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  • Method for detecting melamine through solid-state electrochemiluminescence
  • Method for detecting melamine through solid-state electrochemiluminescence
  • Method for detecting melamine through solid-state electrochemiluminescence

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Embodiment 1

[0035] The method for detecting melamine based on mesoporous silica nanosphere / ruthenium terpyridyl solid-state electrochemiluminescence of the present invention comprises the following steps:

[0036] a. Preparation of mesoporous silica nanospheres

[0037] image 3 Be the mSiO of the embodiment of the present invention 2 SEM images (a, b) and TEM images (c, d) of the nanosphere emission.

[0038] Mix ethanol (60mL), distilled water (80mL), cetyl ammonium bromide (0.30g), 20wt%~25wt% ammonia water (1.2mL) and stir together for 30 minutes to form a uniform dispersion (pH=9~ 12), then gradually drop tetraethyl orthosilicate (0.3mL) into the dispersion, react for 12 hours, the reaction product is centrifuged, washed, and dried, and the dried product is calcined at 650°C to obtain medium Porous silica nanospheres; the particle size is 400-600nm;

[0039] b. The preparation of mesoporous silica nanosphere / ruthenium terpyridyl / Nafion modified electrode, comprising the following...

Embodiment 2

[0051] Wherein the measurement result of melamine recovery rate in milk powder is as follows:

[0052] The amount of melamine added mol.L -1 , 1×10 -6 , test result mol.L -1 , the second time is: 1.1×10 -6 and 1.05×10 -6 , with an average value of 1.056×10 -6 , the recovery was 106% with a standard deviation of 4.4%.

[0053] Except obtaining above measurement result, all the other are with embodiment 1.

[0054] The method for detecting melamine based on mesoporous silica nanospheres / ruthenium terpyridyl solid-state electrochemiluminescence of the present invention fixes ruthenium terpyridyl to the surface of an electrode, and is effectively used for electrochemiluminescence (ECL) detection of melamine. High sensitivity, wide linear range, long-term stability, etc., and the modified electrode shows good electrochemiluminescent properties for melamine, and it is further applied to the detection of melamine in milk powder, providing a basis for the detection of melamine r...

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Abstract

The invention relates to a method for detecting melamine based on mesoporous silica nanosphere/tris(bipyridyl) ruthenium solid-state electrochemiluminescence. The method is characterized by comprising the following steps: a, preparing mesoporous silica nanospheres; b, preparing a mesoporous silica nanosphere/tris(bipyridyl) ruthenium/Nafion modified electrode; c, detecting melamine by using the mesoporous silica nanosphere/tris(bipyridyl) ruthenium/Nafion modified electrode; and d, adopting an electroluminescence detection device to acquire optical signals produced by an electroluminescence detector, and carrying out a computer data processing to obtain the melamine content. According to the method of the present invention, the mesoporous silicon (mSiO2) material has a large surface area and a large pore volume, and the mesoporous silica nanosphere/tris(bipyridyl) ruthenium/Nafion modified electrode can be effectively used for melamine detection through electrochemiluminescence (ECL).

Description

technical field [0001] The invention relates to a method for detecting melamine, in particular to a method for detecting melamine based on mesoporous silica nanosphere / terpyridine ruthenium solid-state electrochemiluminescence. Background technique [0002] Electrochemiluminescence (ECL) is a phenomenon in which light is generated through an electrochemical excitation reaction. In recent years, it has received extensive attention due to its wide linear range, high sensitivity and strong controllability. Among all electrochemiluminescent systems, ruthenium terpyridyl has good chemical and electrochemical stability and has become a Currently one of the most widely used and most actively studied ECL systems has been widely used to detect oxalic acid, alkylamines, NADH, amines and amino compounds. [0003] Melamine (1,3,4,6-triamine 5-triazine-2,C 3 h 6 N 6 MEL) is a synthetic chemical mainly used in the production of amino resins, thermoset plastic foams and fertilizers. I...

Claims

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Application Information

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IPC IPC(8): G01N21/76
Inventor 贾能勤曹宏梅胡晓青
Owner SHANGHAI NORMAL UNIVERSITY
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