Static Headspace GC/MS Method for Determination of Methanol and Ethanol Contents, as the Degradation Markers of Solid Insulation Systems of Power Transformers

Methanol in insulating oil has been proposed as a new marker for condition assessment of the solid insulation system of power transformers. In the current work, as a first step of using the new marker, an analytical static headspace gas chromatography/mass spectrometry method has been developed, opt...

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Bibliographic Details
Published in:Chromatographia 2017-07, Vol.80 (7), p.1129-1135
Main Authors: Molavi, Hoda, Yousefpour, Abbas, Mirmostafa, Akbar, Sabzi, Ali, Hamedi, Sepideh, Narimani, Milad, Abdi, Nazanin
Format: Article
Language:English
Subjects:
Alcohols
Analytical Chemistry
Calibration
Chemistry
Chemistry and Materials Science
Chromatography
Degradation
Ethanol
Gas chromatography
Insulation
Ions
Laboratory Medicine
Markers
Mass spectrometry
Methanol
Pharmacy
Proteomics
Separation
Short Communication
Solids
Standard deviation
Transformers
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Summary:Methanol in insulating oil has been proposed as a new marker for condition assessment of the solid insulation system of power transformers. In the current work, as a first step of using the new marker, an analytical static headspace gas chromatography/mass spectrometry method has been developed, optimized, and validated to measure methanol and ethanol contents in the insulating mineral oil. The analyzing setup consists of a 6890 N gas chromatograph equipped with a 5973 network mass spectrometer (MS) in the absence of a costly headspace autosampler, and the chromatography separation was performed on a 60 m × 320 µm × 0.5 µm VF-WAXms GC column. Calibration curves have been provided using several concentrations of the alcohols, and also limit of detection (LOD), limit of quantification (LOQ), and relative standard deviation percentage (RSD%) have been determined.
ISSN:0009-5893
1612-1112
DOI:10.1007/s10337-017-3315-1