Extraction and quantitation of furanic compounds dissolved in oils

Kóréh, Orsolya; Torkos, K.; Mahara, M. Bashir; Borossay, J.

doi:10.1007/bf02387298

Cited by 4 publications

(2 citation statements)

References 3 publications

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“…Extraction of oil samples was performed by means of a solid phase extraction 8 (SPE) method. 10 cm 3 of oil sample was dissolved in 10 cm 3 HPLC-grade n-pentane (Romil H571, Cambridge, UK).…”

Section: Extraction Of Furanic Compounds From Oilmentioning

confidence: 99%

Determination of furanic compounds in insulating oil by high performance liquid chromatography/mass spectrometry using atmospheric pressure chemical ionization

Kóréh

Ludányi

Vékey

et al. 1998

Rapid Commun. Mass Spectrom.

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A method has been developed to determine furanic compounds in insulating oil matrix using liquid chromatography/mass spectrometry with atmospheric pressure chemical ionization. The examined samples were provided from model experiments and also from several high voltage functioning transformers. To increase sensitivity of the method six furanic compounds (determined by model experiments) were quantified by selected ion monitoring, and quantitation was based on the marker peaks. Oil samples were prepared using solid phase extraction. The results are suitable for evaluation of model experiments and also to solve problems of calibration. From extracts of oil samples taken from functioning transformers cellulose depolymerization products have been identified, and their amounts were found to be valuable in assessing the condition of the transformer (fault diagnosis). # 1998 John Wiley & Sons, Ltd. Received 12 June 1998; Revised 4 August 1998; Accepted 5 August 1998Determination of furanic compounds originating from the thermal depolymerization of cellulose constitutes an important problem in many application fields. For example, in the case of electrical insulation, the quantity and variety of these substances are used to assess performance of insulation in electrical devices. In most cases paper is immersed in insulating oil, which therefore will contain the decomposition products, mainly furan derivatives, and these are monitored in the oil sample. Cellulose degradation is a complex process which is accelerated by the combined effects of temperature and the presence of water and oxygen, which are all available in the environment of transformers. Model experiments suggest that the most important degradation compounds are: 2-furaldehyde, 5-hydroxymethylfuraldehyde, 2-furfuryl-alcohol, 2-acetylfuran, 5-methyl-2-furaldehyde, and 3-furoic acid methyl ester.

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Section: Extraction Of Furanic Compounds From Oilmentioning

confidence: 99%

Determination of furanic compounds in insulating oil by high performance liquid chromatography/mass spectrometry using atmospheric pressure chemical ionization

Kóréh

Ludányi

Vékey

et al. 1998

Rapid Commun. Mass Spectrom.

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“…Moreover, the concentration of gases in different transformers are different, and it is not easy to develop a standard to indicate the aging degree of oil–paper insulation system. Furfural concentration in transformer oil is considered an effective method to judge the aging degree of insulating paper because furfural is produced only by aged paper . However, in the early stage of aging (DP >900), furfural concentrations are low or even undetectable.…”

Section: Introductionmentioning

confidence: 99%

Concentration of 5‐hydroxymethylfurfural produced by insulating paper in an oil–paper insulation system

Chen

et al. 2020

IEEJ Transactions Elec Engng

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The transformer is a core device of the power system, and it is generally considered that the aging of insulating paper is important to the transformer. The aging process of insulating paper is the degradation process of cellulose. If it can be detected regularly, the aging of oil-paper insulating systems can be monitored conveniently. 5-hydroxymethylfurfural is an important chemical substance produced by cellulose decomposition. It has broad prospects because of its many advantages. The oil-paper insulation system was thermally aged at 80, 90, 100, and 110 • C to measure the concentration of 5-hydroxymethylfurfural on insulating paper and in transformer oil. In this paper, the concentration of 5-hydroxymethylfurfural is detected by high-performance liquid chromatography. The linear correlation coefficient of this method can reach 0.99, and the minimum detected concentration can be reduced to 10 μg/l. Experiments show that the concentration of 5-hydroxymethylfurfural increases with the aging time, and when degree of polymerization (DP) decreased, the concentration of 5-hydroxymethylfurfural increased. The correlation coefficient is greater than 0.92, which shows that there is an experimental relationship between the concentration of 5-hydroxymethylfurfural and DP. The parameters of regression curves are different at different temperatures, but in actual operation, the temperature is low and remains stable. Therefore, 5-hydroxymethylfurfural is expected to be a new indicator of the aging degree of oil-paper insulation system.

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Detection of Methanol in Power Transformer Oil Using Spectroscopy

Lei

et al. 2019

J. Electr. Eng. Technol.

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Extraction and quantitation of furanic compounds dissolved in oils

Cited by 4 publications

References 3 publications

Determination of furanic compounds in insulating oil by high performance liquid chromatography/mass spectrometry using atmospheric pressure chemical ionization

Determination of furanic compounds in insulating oil by high performance liquid chromatography/mass spectrometry using atmospheric pressure chemical ionization

Concentration of 5‐hydroxymethylfurfural produced by insulating paper in an oil–paper insulation system

Detection of Methanol in Power Transformer Oil Using Spectroscopy

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