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Method for detecting antioxidant content in transformer oil by using Tafel plots

A transformer oil and antioxidant technology, applied in the field of chemical detection, can solve the problems of large-scale promotion of unfavorable methods, complicated sample pretreatment, and many instruments and drugs, and achieve the effects of optimizing electrochemical measurement conditions, rapid measurement, and improving sensitivity

Active Publication Date: 2014-04-30
CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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Problems solved by technology

[0004] At present, the commonly used methods for detecting the content of T501 antioxidant in transformer oil include spectrophotometry, liquid chromatography and infrared spectroscopy, but each method has great defects: spectrophotometry, sample pretreatment is complicated, and the used There are many instruments and medicines, and the repeatability is poor; liquid chromatography and infrared spectroscopy are relatively accurate in detection, but the instruments and equipment are very expensive, and the measurement time is long, which is not conducive to the large-scale promotion of the method
[0005] Obviously, there is still no relatively mature and simple method for the determination of T501 antioxidant content in transformer oil

Method used

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  • Method for detecting antioxidant content in transformer oil by using Tafel plots

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Embodiment 1

[0027] Determination conditions:

[0028] Instrument: electrochemical workstation; three-electrode system: graphite working electrode with a diameter of 6 mm, saturated calomel reference electrode, 213-type platinum auxiliary electrode; electrolyte system: 0.2 mol L -1 Potassium hydroxide ethanol solution; Tafel diagram: initial potential 0.2V, end potential -0.2V, potential increment 5mV, resting time 2s.

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Abstract

The invention discloses a method for detecting antioxidant content in transformer oil by using Tafel plots, which comprises the following steps: dissolving transformer oil in a specific supporting electrolyte under ultrasonic actions, and detecting T501 antioxidant content in transformer oil by using Tafel plots by using a 6mm-diameter graphite electrode as a working electrode and using an electrochemical work station. The method for detecting T501 antioxidant content in transformer oil by using Tafel plots is established on the basis that the peak current of the T501 antioxidant characteristic peak is directly proportional to the concentration of the T501 antioxidant in transformer oil. Compared with the prior art, the method is simple to operate, has the advantages of low cost, high detection speed and high accuracy, and can implement field analysis on samples.

Description

technical field [0001] The invention belongs to the technical field of chemical detection. Specifically, the invention relates to a method for detecting the content of T501 antioxidant in transformer oil by using a Tafel diagram. Background technique [0002] In order to effectively complete the various functions of transformer oil, the transformer oil itself must have good chemical, physical and electrical properties. Transformer oil is inevitably oxidized during operation, producing a large amount of peroxides and oxidation products such as alcohols, aldehydes, ketones, acids, etc. These oxidation products are very harmful to the safe operation of power system equipment. [0003] Transformer oil is added with T501 antioxidant before leaving the factory to improve the oxidation stability of the oil. However, excessive antioxidants will affect the electrical properties of the oil. At the same time, due to factors such as the operation of the purifier and the aging products ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/48
Inventor 朱志平于卫卫王娜娜汤雪颖
Owner CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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