BS EN 61198-1994 绝缘矿物油.2-糖和有关化合物的测定方法.pdf
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1、BRITISH STANDARD BS EN 61198:1994 IEC 1198:1993 Mineral insulating oils Methods for the determination of 2-furfural and related compounds The European Standard EN 61198:1994 has the status of a British Standard UDC 621.315.615.2:610.1:543.8 BS EN 61198:1994 This British Standard, having been prepare
2、d under the direction of the Cables and Insulation Standards Policy Committee, was published under the authority of the Standards Board and comes into effect on 15 June 1994 BSI 11-1999 The following BSI references relate to the work on this standard: Committee reference CIL/10 Draft for comment 92/
3、03950 DC ISBN 0 580 23385 5 Cooperating organizations The European Committee for Electrotechnical Standardization (CENELEC), under whose supervision this European Standard was prepared, comprises the national committees of the following countries: AustriaItaly BelgiumLuxembourg DenmarkNetherlands Fi
4、nlandNorway FrancePortugal GermanySpain GreeceSweden IcelandSwitzerland IrelandUnited Kingdom Amendments issued since publication Amd. No.DateComments BS EN 61198:1994 BSI 11-1999i Contents Page Cooperating organizationsInside front cover National forewordii Foreword2 Text of EN 611983 National anne
5、x NA (informative) Committees responsibleInside back cover National annex NB (informative) Cross-referencesInside back cover BS EN 61198:1994 ii BSI 11-1999 National foreword This British Standard has been prepared under the direction of the Cables and Insulation Standards Policy Committee and is th
6、e English language version of EN 61198:1994 Mineral insulating oils Methods for the determination of 2-furfural and related compounds, published by the European Committee for Electrotechnical Standardization (CENELEC). It is identical with IEC 1198:1993 published by the International Electrotechnica
7、l Commission (IEC). WARNING. This British Standard calls for the use of substances and procedures that may be injurious to health if adequate precautions are not taken. It refers only to technical suitability and does not absolve the user from legal obligations relating to health and safety at any s
8、tage. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comp
9、rises a front cover, an inside front cover, pages i and ii, the EN title page, pages 2 to 12, an inside back cover and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover.
10、EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 61198 March 1994 UDC 621.315.615.2:610.1:543.8 Descriptors: Liquid electrical insulating materials, mineral oils, chemical analysis, determination, furfural, extraction methods, chromatography analysis, high performance liquid, chromatography Engl
11、ish version Mineral insulating oils Methods for the determination of 2-furfural and related compounds (IEC 1198:1993) Huiles minrales isolantes Mthodes pour la dtermination du 2-furfural et ses drivs (CEI 1198:1993) Isolierle auf Minerallbasis Prfverfahren zur Bestimmung von Fur-fural und verwandten
12、 Verbindungen (IEC 1198:1993) This European Standard was approved by CENELEC on 1993-12-08. CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-d
13、ate lists and bibliographical references concerning such national standards may be obtained on application to the Central Secretariat or to any CENELEC member. This European Standard exists in three official versions (English, French, German). A version in any other language made by translation unde
14、r the responsibility of a CENELEC member into its own language and notified to the Central Secretariat has the same status as the official versions. CENELEC members are the national electrotechnical committees of Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, L
15、uxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Central Secretariat: rue de Stassart 35, B-1050 Br
16、ussels 1994 Copyright reserved to CENELEC members Ref. No. EN 61198:1994 E EN 61198:1994 BSI 11-1999 2 Foreword The text of document 10(CO)270, as prepared by IEC Technical Committee 10: Fluids for electrotechnical applications, was submitted to the IEC-CENELEC parallel vote in October 1992. The ref
17、erence document was approved by CENELEC as EN 61198 on 8 December 1993. The following dates were fixed: Annexes designated “normative” are part of the body of the standard. In this standard, Annex A and Annex ZA are normative. Contents Page Foreword2 Introduction3 1Scope3 2Normative references3 3Sam
18、pling3 4Labelling of samples3 5Apparatus3 5.1 General equipment3 5.2 Equipment for extraction by Method A3 5.3 Equipment for extraction by Method B3 5.4 High-performance liquid chromatograph (HPLC)3 6Reagents3 7Symbols and units4 8Analytes4 9Operating procedure4 9.1 Extraction of the analytes4 9.2 A
19、nalysis of the extract4 10Calibration5 10.1 Standard solutions in oil5 10.2 Standard solution in the chromatographic eluent5 10.3 Procedure5 11Calculations5 12Report5 13Minimum level of detection6 14Precision6 14.1 Repeatability6 14.2 Reproducibility6 Annex A (normative) Checking extraction and reco
20、very7 Annex ZA (normative) Other international publications quoted in this standard with the references of the relevant European publications12 Figure 1 Example of suitable device for extraction with silica cartridge (method B)8 Figure 2 Examples of chromatograms recorded at two wavelengths (220 nm
21、and 276 nm)9 Figure 3 UV spectra of the 2-furfural derivates11 latest date of publication of an identical national standard(dop) 1994-12-01 latest date of withdrawal of conflicting national standards(dow) 1994-12-01 EN 61198:1994 BSI 11-19993 Introduction The degradation of cellulosic materials cons
22、tituting the solid insulation of oil-filled electrical equipment leads to the formation of several compounds specific to cellulose decomposition, such as sugars and furan derivatives. The furan derivatives, of which a large proportion remains adsorbed on the paper, are nevertheless slightly soluble
23、in oil. Their presence can be used as a diagnostic tool to equipments in service and to supplement information from dissolved gas analysis. 1 Scope This International Standard specifies test methods for the analysis of 2-furfural and related furan compounds resulting from the degradation of cellulos
24、ic insulation and found in mineral insulating oil samples taken from electrical equipment. 2-furfural and related furan compounds dissolved in mineral oil are analysed by high performance liquid chromatography (HPLC). Prior to HPLC analysis, furan derivatives are extracted from the oil by use of a s
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