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Identification of Impurities of Unknown Composition in Insulating Oil by Gas Chromatography-Mass Spectrometry (GC-MS)

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Power Technology and Engineering Aims and scope

This paper presents the results of a study of the behavior of an antioxidant additive (ionol) in insulating oil from existing high-voltage equipment. Decomposition products of the inhibitor (ionol), the concentration of which changes as the oil ages, were found in the oil samples. These compounds can be attributed to impurity compounds, which can also serve as additional markers of aging of a liquid dielectric. The ionol degradation products were analyzed by gas chromatography with a flame-ionization detector (FID) and a mass spectrometric detector (MSD). The advantages of the gas chromatography-mass spectrometric method over gas chromatography with an FID are shown. Compounds that are formed as the oxidation inhibitor (ionol) is consumed are identified using chromatography-mass spectrometry. It has been found that the ionol concentration decreases as the mineral oil ages. At the same time, the concentration of ionol “metabolites” increases and becomes much higher than the concentration of the additive itself.

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Authors and Affiliations

  1. Branch of JSC Federal Grid Company of Unified Energy Systems, Yamal-Nenets PMES, Khanty-Mansiysk Autonomous Okrug – Yugra, Noyabrsk, Russia

    M. N. Lyutikova

  2. Khanty-Mansiysk State Medical Academy, Khanty-Mansiysk Autonomous Okrug – Yugra, Khanty-Mansiysk, Russia

    S. V. Nekhoroshev

  3. V. I. Shpilman Research and Analytical Centre for the Rational Use of the Subsoil, Khanty-Mansiysk Autonomous Okrug – Yugra, Khanty-Mansiysk, Russia

    V. M. Kuklina & M. G. Kulkov

Authors
  1. M. N. Lyutikova
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  2. S. V. Nekhoroshev
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  3. V. M. Kuklina
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  4. M. G. Kulkov
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Correspondence to M. N. Lyutikova.

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Translated from Élektricheskie Stantsii, No. 6, June 2020, pp. 47 – 53.

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Lyutikova, M.N., Nekhoroshev, S.V., Kuklina, V.M. et al. Identification of Impurities of Unknown Composition in Insulating Oil by Gas Chromatography-Mass Spectrometry (GC-MS). Power Technol Eng 54, 594–599 (2020). https://doi.org/10.1007/s10749-020-01257-0

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  • DOI: https://doi.org/10.1007/s10749-020-01257-0

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