A Novel Method of Detecting Methanol in Transformer Oil Based on Methanol Gas Sensor With Solid-Phase Extraction Technology

Song Cheng; Guokai Huang; Liang Zhang; Wei Sun; Qingguo Chen

doi:10.1049/hve2.70092

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A Novel Method of Detecting Methanol in Transformer Oil Based on Methanol Gas Sensor With Solid-Phase Extraction Technology

更新时间：2026-03-24

- A Novel Method of Detecting Methanol in Transformer Oil Based on Methanol Gas Sensor With Solid-Phase Extraction Technology
- A Novel Method of Detecting Methanol in Transformer Oil Based on Methanol Gas Sensor With Solid-Phase Extraction Technology
- 高电压（英文） 2025年10卷第5期
- 作者机构：
  
  1. The Key Laboratory of Engineering Dielectrics and Its Application (Ministry of Education), Harbin University of Science and Technology,Harbin,China
  2. School of Electrical and Electronics Engineering, Harbin University of Science and Technology,Harbin,China
  3. TBEA Shenyang Transformer Group Company Limited,Shenyang,China
  4. Department of Science and Innovation, Electric Power Research Institute, State Grid Heilongjiang Electric Power Company Ltd.,Harbin,China
- 作者简介：
- 基金信息：
- DOI：10.1049/hve2.70092
  中图分类号：
- 纸质出版：2025
- 稿件说明：
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Song Cheng, Guokai Huang, Liang Zhang, 等. A Novel Method of Detecting Methanol in Transformer Oil Based on Methanol Gas Sensor With Solid-Phase Extraction Technology[J]. 高电压（英文）, 2025,10(5).

Song Cheng, Guokai Huang, Liang Zhang, et al. A Novel Method of Detecting Methanol in Transformer Oil Based on Methanol Gas Sensor With Solid-Phase Extraction Technology[J]. High Voltage, 2025, 10(5).
Song Cheng, Guokai Huang, Liang Zhang, 等. A Novel Method of Detecting Methanol in Transformer Oil Based on Methanol Gas Sensor With Solid-Phase Extraction Technology[J]. 高电压（英文）, 2025,10(5). DOI： 10.1049/hve2.70092.

Song Cheng, Guokai Huang, Liang Zhang, et al. A Novel Method of Detecting Methanol in Transformer Oil Based on Methanol Gas Sensor With Solid-Phase Extraction Technology[J]. High Voltage, 2025, 10(5). DOI： 10.1049/hve2.70092.

摘要

As a novel chemical marker

methanol has been widely applied to evaluate the ageing state of insulating paper in recent years. Methanol gas sensor (MGS) could be applied to detect the methanol content in transformer oil for its high portability and stability. However

it has the defects of a high limit of detection (LOD) and poor anti-interference performance. Therefore

a novel method of detecting methanol in transformer oil based on MGS with the solid-phase extraction (SPE) technology was investigated in this paper. A detection platform for methanol in transformer oil based on SPE was established

and the SPE experimental process and the crucial parameters were optimised. The results show that the SPE decreased the LOD of MGS from 0.4 to 0.2 ppm and effectively eliminated the interfering substances in oil. Although a part of methanol would be lost during the SPE process

the regression correction coefficient was proposed to correct the evaluation errors. The results indicate that the average relative errors decreased from 17.09% to 4.38%

and the proposed method has good applicability.

Abstract

As a novel chemical marker

it has the defects of a high limit of detection (LOD) and poor anti-interference performance. Therefore

the regression correction coefficient was proposed to correct the evaluation errors. The results indicate that the average relative errors decreased from 17.09% to 4.38%

and the proposed method has good applicability.

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