Determination of the aromatic hydrocarbon content of new mineral insulating oils

Applies to quality control and acceptance testing of oils. Two methods of analysis are given: infra-red spectrophotometry and adsorption chromatography.

Bestimmung des Gehlts an aromatischen Kohlenwasserstoffen von neuen Isolierölen

Détermination de la teneur en hydrocarbures aromatiques des huiles isolantes minérales neuves

S'applique au contrôle de qualité et de réception des huiles. Donne deux méthodes d'analyse: par spectrophotométrie infrarouge, par chromatographie d'absorption.

Determination of the aromatic hydrocarbon content of new mineral insulating oils (IEC 60590:1977)

General Information

Status
Published
Publication Date
23-Apr-1979
Current Stage
6060 - Document made available
Start Date
24-Apr-1979
Completion Date
24-Apr-1979

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HD 382 S1:1999
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SLOVENSKI STANDARD
SIST HD 382 S1:1999
01-januar-1999
Determination of the aromatic hydrocarbon content of new mineral insulating oils
(IEC 60590:1977)
Determination of the aromatic hydrocarbon content of new mineral insulating oils
Bestimmung des Gehlts an aromatischen Kohlenwasserstoffen von neuen Isolierölen

Détermination de la teneur en hydrocarbures aromatiques des huiles isolantes minérales

neuves
Ta slovenski standard je istoveten z: HD 382 S1:1979
ICS:
29.040.10 Izolacijska olja Insulating oils
SIST HD 382 S1:1999 en

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST HD 382 S1:1999
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SIST HD 382 S1:1999
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SIST HD 382 S1:1999
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SIST HD 382 S1:1999
NORME
CEI
INTERNATIONALE
IEC
590
INTERNATIONAL
Première édition
STAN DARD
First edition
1977-01
Détermination de la teneur en hydrocarbures
aromatiques des huiles isolantes minérales neuves
Determination of the aromatic hydrocarbon content
of new mineral insulating oils
© IEC 1977 Droits de reproduction réservés — Copyright - all rights reserved

Aucune partie de cette publication ne peut être reproduite ni No part of this publication may be reproduced or utilized in

utilisée sous quelque forme que ce soit et par aucun any form or by any means, electronic or mechanical,

procédé, électronique ou mécanique, y compris la photo- including photocopying and microfilm, without permission in

copie et les microfilms, sans l'accord écrit de l'éditeur. writing from the publisher.

International Electrotechnical Commission 3, rue de Varembé Geneva, Switzerland
Telefax: +41 22 919 0300 e-mail: inmail@iec.ch IEC web site http: //www.iec.ch
CODE PRIX
Commission Electrotechnique Internationale
PRICE CODE
International Electrotechnical Commission
JEC MemayHapoQHast 3nenrporexHHVecnan HoMHCCHc
Pour prix, voir catalogue en vigueur
• • For price, see current catalogue
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SIST HD 382 S1:1999
cation 590 I E C Publi
Publication 590 de la C E I
First edition — 1977
Premiere edition — 1977
hydrocarbures Determination of the aromatic hydrocarbon
Détermination de la teneur en
content of new mineral insulating oils
aromatiques des huiles isolantes minérales neuves
CORRIGENDUM 1
Page II
Page 10
2.2.4 Procedure
2.2.4 Mode opératoire
Item in) , page 13:
Point in), page 12:
instead of:
au lieu de:
(1 torr = 1.3 103 Pa)
(1 ton = 1,3 10 8 Pa)
read:
lire:
(1 torr = 1.3 10 2 Pa)
(1 torr = 1,3 10 2 Pa)
July 1978
Juillet 1978
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SIST HD 382 S1:1999
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SIST HD 382 S1:1999
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CONTENTS
Page
FOREWORD 5
PREFACE 5
Clause
1. Scope 7
2. Test methods 7
7 - 2.1 Infrared spectrophotometric analysis
2.1.1 Principle of the method 7
2.1.2 Apparatus 7
2.1.3 Procedure 9
Calculation of the result 2.1.4
2.1.5 Precision 9
Adsorption chromatography analysis 2.2
Principle of the method 9
2.2.1
2.2.2 Apparatus
2.2.3 Reagents
2.2.4 Procedure
13 2.2.5 Calculation of the result
2.2.6 Precision
FIGURES
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SIST HD 382 S1:1999
INTERNATIONAL ELECTROTECHNICAL COMMISSION
DETERMINATION OF THE AROMATIC HYDROCARBON CONTENT
OF NEW MINERAL INSULATING OILS
FOREWORD

1) The formal decisions or agreements of the I E C on technical matters, prepared by Technical Committees on which all the

National Committees having a special interest therein are represented, express, as nearly as possible, an international

consensus of opinion on the subjects dealt with.

2) They have the form of recommendations for international use and they are accepted by the National Committees in that

sense.

3) In order to promote international unification, the I E C expresses the wish that all National Committees should adopt

the text of the I E C recommendation for their national rules in so far as national conditions will permit. Any divergence

between the I E C recommendation and the corresponding national rules should, as far as possible, be clearly indicated

in the latter.
PREFACE

This standard has been prepared by Sub-Committee 10A: Hydrocarbon Insulating Oils, of I E C Technical Committee

No. 10, Liquid and Gaseous Dielectrics.
A first draft was discussed during the meeting held in Baden-Baden in 1975.

As a result of this meeting, a new draft, Document 10A(Central Office)30, was submitted to the National Committees for

approval under the Six Months' Rule in May 1976.
The following countries voted explicitly in favour of publication:
Austria Netherlands
Belgium Poland
Canada Romania
Czechoslovakia South Africa (Republic of)
Denmark Spain
Egypt Sweden
Finland Switzerland
France Turkey
Germany Union of Soviet
Hungary Socialist Republics
Korea (Democratic People's United States of America
Republic of)

An addendum, Document 10A(Central Office)30A, relating to Figure 1, was submitted to the National Committees for

approval under the Six Months' Rule in August 1976.
The following countries voted explicitly in favour of publication:
Austria South Africa (Republic of)
Belgium Spain
Canada Sweden
Denmark Switzerland
Egypt Turkey
Germany United States of America
Netherlands
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SIST HD 382 S1:1999
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DETERMINATION OF THE AROMATIC HYDROCARBON CONTENT
OF NEW MINERAL INSULATING OILS
Scope

This standard deals with the determination of the aromatic hydrocarbon content of new mineral

insulating oils.
Two methods are proposed:
Infrared spectrophotometric analysis

This method is recommended as a quality control and acceptance test for mineral insulating

oils. It uses the relationship between the absorbance at 1 610 cm- 1 and the n-d-M analysis *

ng structures. The
to determine the proportion of the total carbon atoms present in aromatic ri

conversion factor derived from this relationship is applicable to oils with a molecular mass in

the range 290 to 500 and with an aromatic carbon content in the range 1.2 % to 60%.

— Adsorption chromatographic analysis

This method describes the measurement of the percentage by mass of polar compounds and

compounds containing at least one aromatic ring per molecule present in low molecular mass

mineral insulating oils.
2. Test methods
Infrared spectrophotometric analysis
2.1
2.1.1 Principle of the method

The infrared absorption spectrum of the sample to be analyzed is recorded and the absorption

characteristic of the aromatic ring at 1 610 cm- 1 is measured. This absorption is a function of the

amount of aromatic carbon.
2.1.2 Apparatus
Infrared spectrophotometer
in the region of 1 600 cm-1.
Double beam spectrophotometer having a resolution better than 3 cm- 1
Cell

Any infrared liquid cell with variable or fixed path length with NaC1 windows. The path length

will be comprised between 0.05 mm and 0.30 mm and shall be known within ±0.003 mm, or better.

The most suitable length will be dictated by the content of aromatic hydrocarbons which is to

be determined.

The path length can be determined by any procedure described in any handbook on infrared

spectrophotometry.
pp. 700-702, October 1958.
* G. Brandes: Erdôl und Kohle, 11,
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SIST HD 382 S1:1999
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2.1.3 Procedure

a) Adjust the spectrophotometer in accordance with the instructions given in the manufacturer's

handbook.
b) Fill the cell with the oil to be examined.
c) Set the cell at the correct place in the spectrophotometer.
d) Record the complete infrared spectrum.
using, as a baseline, the tangent to the spectrum
e) Measure the transmitted intensity at 1 610 cm- 1
curve at the minima of this absorption band (see Figure 1, page 16).
2.1.4 Calculation of the result
Cal
...

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