A method for detecting methanol in an ethanol solution
By using an amine catalyst and an active ester solution for transesterification, p-nitrophenol anions with ultraviolet absorption are generated. Methanol in ethanol solution is then detected using an ultraviolet spectrometer, solving the problem of complex and expensive detection in existing technologies and achieving simple, sensitive and specific methanol detection.
CN117129435BActive Publication Date: 2026-07-24HUAQIAO UNIVERSITY
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Patent Information
- Application Number
- CN202310977406.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2023-08-04
- Publication Date
- 2026-07-24
- Estimated Expiration
- 2043-08-04
AI Technical Summary
Technical Problem
Existing methods for detecting methanol suffer from problems such as expensive instruments, complex processing, and time-consuming procedures, making it difficult to achieve effective identification under mild conditions.
Method used
An amine catalyst and an active ester solution containing a strong electron-withdrawing nitro group were reacted with an ethanol solution to generate p-nitrophenol anions that absorb ultraviolet light through transesterification. The methanol content was then detected using an ultraviolet spectrometer.
Benefits of technology
It enables simple, sensitive and specific detection of methanol content in ethanol solutions, with high detection accuracy and repeatability.
✦ Generated by Eureka AI based on patent content.
Abstract
The application discloses a method for recognizing and detecting methanol in an ethanol solution. The method utilizes the transesterification reaction between methanol in a mixed solution and a reactive ester under the promotion of an amine to generate a p-nitrophenol negative ion with ultraviolet absorption. The ultraviolet intensity is detected by using an ultraviolet spectrometer, so that the methanol content can be measured. The method fully utilizes the principle of the transesterification reaction, a catalyst diethylamine, the generation of a p-nitrophenol negative ion (4-NP), the generation of ultraviolet absorption, the detection of the ultraviolet intensity by using the ultraviolet spectrometer, and the purpose of simply, sensitively and specifically detecting the methanol.
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