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Application of rhodamine B derivative in nitrite ion detection

A technology of nitrite ions and derivatives, applied in the measurement of color/spectral properties, fluorescence/phosphorescence, material excitation analysis, etc., can solve the problems of complex process, high cost, low detection limit, etc., and achieve fast reaction and detection limit. Low and high selectivity effects

Inactive Publication Date: 2012-06-27
XIAMEN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] In order to solve the problems of complex process, low detection limit, non-portability and high cost in traditional nitrite detection methods, the present invention provides an application of rhodamine B derivatives in the detection of nitrite ions

Method used

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  • Application of rhodamine B derivative in nitrite ion detection
  • Application of rhodamine B derivative in nitrite ion detection
  • Application of rhodamine B derivative in nitrite ion detection

Examples

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Embodiment

[0029] 1) Prepare the standard solution of rhodamine B lactam-o-phenylenediamine:

[0030] Weigh 100 mg of rhodamine B lactam-o-phenylenediamine and dissolve in 10 mL of N,N-dimethylformamide solution. The standard solution of 1 mg / mL rhodamine B lactam-o-phenylenediamine was obtained;

[0031] 2) Prepare standard solution of sodium nitrite:

[0032] Weigh 69 mg of sodium nitrite, dissolve it in 100 mL of ultrapure water, mix well, and then take 100 μL of the solution into 10 mL of ultrapure water to obtain a 100 μmol / L sodium nitrite standard solution;

[0033] 3) Prepare 1 mol / L HCl aqueous solution:

[0034] Dilute 1 mL of concentrated hydrochloric acid to 12.1 mL with ultrapure water to obtain 1 mol / L HCl aqueous solution;

[0035] 4) Prepare a N,N-dimethylformamide solution of triethylamine with a volume ratio of 1.875%:

[0036] Dissolve 300 μL of triethylamine in 8 mL of N,N-dimethylformamide to obtain a solution of triethylamine in N,N-dimethylformamide with a volu...

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Abstract

The invention discloses an application of a rhodamine B derivative in nitrite ion detection, and the rhodamine B derivative is the rhodamine B derivative by connecting five-membered spirolactam in molecule with 1,2-phenylenediamine. The rhodamine B derivative for nitrite detection is characterized in that 1,2-phenylenediamine is reacted with nitrite under acidic condition, and ring opening of the the rhodamine five-membered spirolactam in molecule is initiated, and a substance with the magenta color and strong fluorescence is generated. The invention has the beneficial effect that intermolecular five-membered rhodamine B spirolactam-o-phenylendiamine is reacted with nitrite to generate the substance possessing color and emission fluorescence. The color development reaction can be used in the fields that 1) nitrite existence can be visually measured; 2) the measurement of the fluorescent emission intensity or visible light absorption intensity of the reaction system through an analysis apparatus enables quantitative determination of the content of the nitrite in the sample.

Description

technical field [0001] The present invention relates to the use of rhodamine B derivatives, in particular to the use of rhodamine B derivatives in the detection of nitrite ions. Background technique [0002] Nitrite is an intermediate product of the nitrogen cycle in nature. It is unstable and widely exists in water, soil and various foods. Under different water quality conditions, it can be oxidized and reduced to other nitrogen-containing compounds. Nitrite can oxidize low iron hemoglobin in human blood into methemoglobin, reduce its ability to transport oxygen, lead to tissue hypoxia symptoms, and cause human hypoxia poisoning. On the other hand, nitrite can also undergo nitrosation reactions with secondary amines generated by human protein metabolism to generate nitrosamines or imides, thereby inducing cancer and distortion in various organs and tissues. Therefore, it is of great significance to be able to detect nitrite sensitively and quickly through the method of co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/64G01N21/31
Inventor 韩家淮薛钟慰韩守法
Owner XIAMEN UNIV
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