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Method for detecting antioxidant content in transformer oil by square wave voltammetry

A technology of square wave voltammetry and transformer oil, which is applied in the field of chemical detection, can solve the problems of large-scale promotion of unfavorable methods, complicated sample pretreatment, expensive instruments and equipment, etc., to achieve optimized electrochemical measurement conditions, rapid measurement, and low cost Effect

Active Publication Date: 2016-03-23
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

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  • Method for detecting antioxidant content in transformer oil by square wave voltammetry

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Embodiment

[0029] Determination conditions:

[0030] Instrument: electrochemical workstation; three-electrode system: graphite working electrode with a diameter of 6mm, saturated calomel reference electrode, 213-type platinum auxiliary electrode; electrolyte system: 0.2mol L -1 Potassium hydroxide ethanol solution; square wave voltammetry: initial potential +0.4V, end potential -0.4V, potential increment 5mV, frequency 15 Hz, sampling width 0.001s, rest time 2.0s.

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Abstract

The invention discloses a method for detecting antioxidant content in transformer oil by square wave voltammetry. The method is to ultrasonically dissolve a certain amount of transformer oil in a certain volume of supporting electrolyte, and use a graphite electrode with a diameter of 6 mm as a working electrode. The square wave voltammetric method was used to measure the content of T501 antioxidant in transformer oil by electrochemical workstation. On the basis that the peak current of the characteristic peak of T501 antioxidant was proportional to its concentration in transformer oil, the method of using square wave was established. Voltammetric method for detecting the content of T501 antioxidant in transformer oil. Compared with the prior art, the invention has simple operation, low cost, rapid measurement and high accuracy, and can realize on-site analysis of 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 square wave voltammetry. Background technique [0002] Transformer insulating oil refers to a type of insulating oil suitable for insulation, cooling and arc extinguishing in oil-filled electrical equipment such as transformers, reactors, transformers, bushings, and circuit breakers. 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. On the one hand, it accelerates the destruction of solid insulating materi...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N27/48
Inventor 朱志平于卫卫代陈林王娜娜
Owner CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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