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1.1 This test method covers the determination by gas chromatography of 2,6-ditertiary-butyl para-cresol and 2,6-ditertiary-butyl phenol in new and used insulating liquids at concentrations up to 0.5%. It includes the determination in Type I and II insulating mineral oils as specified in Specification D3487, but has also been used to measure these inhibitors in other insulating liquids, such as esters and high fire-point hydrocarbons.
1.2 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.
D923 Practices for Sampling Electrical Insulating Liquids
D3487 Specification for Mineral Insulating Oil Used in Electrical Apparatus
D5222 Specification for High Fire-Point Mineral Electrical Insulating Oils
E260 Practice for Packed Column Gas Chromatography
ICS Number Code 29.040.10 (Insulating oils)