1. Scope

1.1 This test method describes the determination in electrical insulating liquids of products of the degradation of cellulosic materials such as paper, pressboard, and cotton materials typically found as insulating materials in electrical equipment. These degradation products are substituted furan derivatives, commonly referred to as furanic compounds or furans. This test method allows either liquid/liquid or solid phase extraction (SPE) of the furanic compounds from the sample matrix followed by analysis for specific furanic compounds by HPLC or direct injection for analysis of specific furanic compounds by HPLC.

1.2 The individual furanic compounds that may be identified and quantified include the following:

1.3 The direct injection method generally has a higher limit of detection, especially for furfuryl alcohol. Greater interference for furfuryl alcohol may be expected when using the direct injection method as opposed to extraction methods.

1.4 This test method has been used to successfully test for furanic compounds in mineral insulating oil, silicone fluid, high fire point electrical insulating oils of mineral origin, askarels, and perchloroethylene based dielectric fluids.

This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.

International Electrotechnical Commission (IEC) Standard

ASTM Standards

D923 Practices for Sampling Electrical Insulating Liquids

D3487 Specification for Mineral Insulating Oil Used in Electrical Apparatus

D3612 Test Method for Analysis of Gases Dissolved in Electrical Insulating Oil by Gas Chromatography

Keywords

direct injection; furaldehyde; furanic; furanoid; furans; furfural; furfuraldehyde; furfuryl alcohol; furfurylfurfurol; furyl; HPLC; liquid/liquid extraction; solid-phase extraction; SPE; 5-hydroxymethyl-2-furaldehyde; 2-furaldehyde; 2-acetylfuran; ?5-methyl-2-furaldehyde; 2-Acetyl furan; Electrical insulating liquids; 2-Furaldehyde; Furanic compounds; Furfuraldehyde; Furfuryl alcohol; Furyl//furfuryl//furfurol//furfural; HPLC (high performance liquid chromatography); 5-Hydroxymethyl-2-furfural; Liquid extraction; Methyl-furfural; Solid phase extraction (SPE);

ICS Code

ICS Number Code 71.080.20 (Halogenated hydrocarbons)

DOI: 10.1520/D5837-99R05

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