1、 INTERNATIONAL STANDARD IECCEI NORME INTERNATIONALE62021-2First editionPremire dition2007-05 Insulating liquids Determination of acidity Part 2:Colourimetric titration Liquides isolants Dtermination de lacidit Partie 2:Titrage colorimtrique Reference number Numro de rfrence IEC/CEI 62021-2:2007 LICE
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15、ire dition2007-05 Insulating liquids Determination of acidity Part 2:Colourimetric titration Liquides isolants Dtermination de lacidit Partie 2:Titrage colorimtrique For price,see current cataloguePour prix,voir catalogue en vigueur PRICE CODE CODE PRIX P Commission Electrotechnique InternationaleIn
16、ternational Electrotechnical Commission LICENSED TO MECON Limited.-RANCHI/BANGALOREFOR INTERNAL USE AT THIS LOCATION ONLY,SUPPLIED BY BOOK SUPPLY BUREAU.2 62021-2 IEC:2007 CONTENTS FOREWORD.3 INTRODUCTION.5 1 Scope.6 2 Normative references.6 3 Terms and definitions.7 4 Principle.7 5 Reagents.7 5.1 Titration reagent.7 5.2 Titration solvent.8 5.3 Potassium hydrogen phthalate,primary standard.8 5.4 Standard hydrochloric acid solution.8 5.5 Alkali Blue 6B indicator solution.8 5.6 Cobalt nitrate solu
