Crude petroleum and fuel oils - Determination of sediment - Extraction method (ISO 3735:1999)

Migrated from Progress Sheet (TC Comment) (2000-07-10): Updating of existing EN implementations of ISO standards (standing resolution); ++ Will go to VA.

Rohöle und Heizöle - Bestimmung des Gehalts an Sediment - Extraktionsverfahren (ISO 3735:1999)

Pétrole brut et fuel-oils - Détermination de la teneur en sédiments - Méthode par extraction (ISO 3735:1999)

La présente Norme internationale prescrit une méthode de détermination de la teneur en sédiments du pétrole brut et des fuel-oils par extraction au toluène. La fidélité s'applique à un intervalle de teneur en sédiments compris entre 0,01 % (m/m) et 0,40 % (m/m), bien que des niveaux plus élevés puissent être déterminés.  
NOTE 1 Si la présente Norme internationale est appliquée aux échantillons de pétrole brut contenant des quantités significatives de sels, une surestimation de la teneur en sédiments peut être obtenue parce qu'une certaine quantité des sels non organiques peut être retenue dans la cartouche d'extraction. Ce problème n'est en général pas significatif pour les échantillons de pétrole brut contenant moins de 0,1 % (m/m) de sels totaux.  
NOTE 2 Pour les besoins de la présente Norme internationale, les termes «% (m/m») et «% (V/V)» sont utilisés pour représenter respectivement les fractions massiques et volumiques des produits.

Surova nafta in kurilna olja - Določevanje usedline - Metoda z ekstrakcijo (ISO 3735:1999)

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SIST EN ISO 3735:1999
SIST EN ISO 3735:1998

Crude petroleum and fuel oils - Determination of sediment - Extraction method (ISO


Rohöle und Heizöle - Bestimmung des Gehalts an Sediment - Extraktionsverfahren (ISO


Pétrole brut et fuel-oils - Détermination de la teneur en sédiments - Méthode par

extraction (ISO 3735:1999)
Ta slovenski standard je istoveten z: EN ISO 3735:1999
75.040 Surova nafta Crude petroleum
75.160.20 7HNRþDJRULYD Liquid fuels
SIST EN ISO 3735:1999 en

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

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SIST EN ISO 3735:1999
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SIST EN ISO 3735:1999
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SIST EN ISO 3735:1999
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SIST EN ISO 3735:1999
Second edition
Crude petroleum and fuel oils —
Determination of sediment — Extraction
Pétrole brut et fuel-oils — Détermination de la teneur en sédiments —
Méthode par extraction
Reference number
ISO 3735:1999(E)
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SIST EN ISO 3735:1999
ISO 3735:1999(E)

ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO

member bodies). The work of preparing International Standards is normally carried out through ISO technical

committees. Each member body interested in a subject for which a technical committee has been established has

the right to be represented on that committee. International organizations, governmental and non-governmental, in

liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical

Commission (IEC) on all matters of electrotechnical standardization.

Draft International Standards adopted by the technical committees are circulated to the member bodies for voting.

Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote.

International Standard ISO 3735 was developed by Technical Committee TC 28, Petroleum products and lubricants,

Subcommittee 6, Bulk cargo transfer, accountability, inspection and reconciliation.

This second edition cancels and replaces the first edition (ISO 3735:1975), of which it constitutes a technical

© ISO 1999

All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic

or mechanical, including photocopying and microfilm, without permission in writing from the publisher.

International Organization for Standardization
Case postale 56 • CH-1211 Genève 20 • Switzerland
Printed in Switzerland
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SIST EN ISO 3735:1999
Crude petroleum and fuel oils — Determination of
sediment — Extraction method

WARNING — The use of this International Standard may involve hazardous materials, operations and

equipment. This International Standard does not purport to address all of the safety problems associated

with its use. It is the responsibility of the user of this International Standard to establish appropriate safety

and health practices and determine the applicability of regulatory limitations prior to use.

1 Scope

This International Standard specifies a method for the determination of sediment in crude petroleum and fuel oils by

extraction with toluene. The precision applies to a range of sediment levels from 0,01 % (m/m) to 0,40 % (m/m),

although higher levels may be determined.

NOTE 1 If this International Standard is applied to crude petroleum samples containing significant amounts of salts, an

overestimation of the sediment content may be obtained because a proportion of the inorganic salts may be trapped in the

extraction thimble. This problem is generally not significant for crude petroleum samples containing less than 0,1 % (m/m) total


NOTE 2 For the purposes of this International Standard, the terms “% (m/m)” and “% (V/V)” are used to represent the mass

and volume fractions of materials, respectively.
2 Normative references

The following standards contain provisions which, through reference in this text, constitute provisions of this

International Standard. At the time of publication, the editions indicated were valid. All standards are subject to

revision, and parties to agreements based on this International Standard are encouraged to investigate the

possibility of applying the most recent editions of the standards indicated below. Members of IEC and ISO maintain

registers of currently valid International Standards.
ISO 1773:1997, Laboratory glassware — Narrow-necked boiling flasks.
ISO 3170:1988, Petroleum liquids — Manual sampling.
ISO 3171:1988, Petroleum liquids — Automatic pipeline sampling.

ISO 4793:1980, Laboratory sintered (fritted) filters — Porosity grading, classification and designation.

ISO 5272:1979, Toluene for industrial use — Specifications.
3 Principle

A test portion, in a refractory thimble, is extracted with hot toluene until the residue reaches constant mass.

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SIST EN ISO 3735:1999
ISO 3735:1999(E)
4 Reagents and materials
4.1 Methylbenzene (toluene), (C H CH ), conforming to grade 2 of ISO 5272.
6 5 3
5 Apparatus
Usual laboratory apparatus and glassware, together with the following:

5.1 Extraction apparatus, as illustrated in figures 1 and 2, and consisting of the elements described in 5.1.1 to


5.1.1 Extraction flask, consisting of a wide-necked conical (Erlenmeyer) flask of 1 litre capacity, conforming

generally to the requirements of ISO 1773, but with a minimum external neck diameter of 50 mm.

5.1.2 Condenser, in the form of a metal coil approximately 25 mm in diameter and 50 mm in length attached to,

and with the ends projecting through, a lid of sufficient diameter to cover the neck of the flask as shown in figure 1.

The coil shall be made from stainless steel, tin, tin-plated copper or tin-plated brass tubing having an outside

diameter of 5 mm to 8 mm and a wall thickness of approximately 1,5 mm. If constructed of tin-plated copper or

brass, the tin coating shall have a minimum thickness of 0,075 mm.

NOTE The exposed area of the coil for cooling purposes is approximately 115 cm .

5.1.3 Extraction thimble, of a refractory porous material, pore size index P 16 according to ISO 4793, 25 mm in

diameter by 70 mm in height, weighing not less than 15 g and not more than 17 g. The thimble shall be suspended

from the condenser coil by means of a basket so that it hangs approximately mid-way between the surface of the

extracting solvent (4.1) and the bottom of the condenser coil (see 5.1.2).

corrosion-resistant, made of platinum, stainless steel, nickel-chromium alloy, or similar

5.1.4 Thimble basket,
material. It shall meet the design and dimension requirements of figure 2.

5.1.5 Water cup, for use when testing a sample with a water content in excess of 10 % (V/V) [see figure 1b)]. The

cup shall be made of glass, conical in shape, approximately 20 mm in diameter and 25 mm deep, having a capacity

of approximately 3 ml. A glass hook shall be fused onto the rim on one side and shaped so that, when hung on the

condenser, the cup hangs with its rim reasonably level.

In these procedures, the thimble basket is suspended either as shown in figure 1a), by means of the corrosion-

resistant wire looped over the bottom of the condenser coil and attached to the basket supports, or as in figure 1b),

where the wire supports of the basket are attached to hooks soldered to the underside of the condenser lid.

5.1.6 Heater, suitable for vaporizing the toluene.
NOTE A hotplate is preferred.
5.2 Analytical balance, with an accuracy of 0,1 mg.

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