SIST ISO 975:2002

Brown coals and lignites -- Determination of yield of benzene-soluble extract -- Semi-automatic method

Charbons bruns et lignites -- Détermination du rendement en extrait de benzène soluble -- Méthode semi-automatique

Rjavi premogi in ligniti - Določevanje izkoristka ekstrakta, topnega v benzenu - Polavtomatska metoda

General Information

• Status: Withdrawn
• Publication Date: 31-May-2002
• Withdrawal Date: 10-Sep-2013
• ICS: 73.040 - Coals
• Technical Committee: IRUD - Mining
• Current Stage: 9900 - Withdrawal (Adopted Project)
• Start Date: 11-Sep-2013
• Due Date: 04-Oct-2013
• Completion Date: 11-Sep-2013
• Ref Project: ISO 975:2000 - Brown coals and lignites — Determination of yield of benzene-soluble extract — Semi-automatic method

Relations

• Replaces: SIST ISO 975:1998 - Brown coals and lignites -- Determination of yield of toluene-soluble extract
• Effective Date: 01-Jun-2003

Standards Content (Sample)

INTERNATIONAL ISO
STANDARD 975
Third edition
2000-10-01
Brown coals and lignites — Determination
of yield of benzene-soluble extract —
Semi-automatic method
Charbons bruns et lignites — Détermination du rendement en extrait de
benzène soluble — Méthode semi-automatique
Reference number
ISO 975:2000(E)
©
ISO 2000

---------------------- Page: 1 ----------------------
ISO 975:2000(E)
PDF disclaimer
This PDF file may contain embedded typefaces. In accordance with Adobe's licensing policy, this file may be printed or viewed but shall not
be edited unless the typefaces which are embedded are licensed to and installed on the computer performing the editing. In downloading this
file, parties accept therein the responsibility of not infringing Adobe's licensing policy. The ISO Central Secretariat accepts no liability in this
area.
Adobe is a trademark of Adobe Systems Incorporated.
Details of the software products used to create this PDF file can be found in the General Info relative to the file; the PDF-creation parameters
were optimized for printing. Every care has been taken to ensure that the file is suitable for use by ISO member bodies. In the unlikely event
that a problem relating to it is found, please inform the Central Secretariat at the address given below.
© ISO 2000
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 either ISO at the address below or ISO's member body
in the country of the requester.
ISO copyright office
Case postale 56 � CH-1211 Geneva 20
Tel. + 41 22 749 01 11
Fax + 41 22 749 09 47
E-mail [e-mail]
Web www.iso.ch
Printed in Switzerland
ii © ISO 2000 – All rights reserved

---------------------- Page: 2 ----------------------
ISO 975:2000(E)
Foreword
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.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 3.
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.
Attention is drawn to the possibility that some of the elements of this International Standard may be the subject of
patent rights. ISO shall not be held responsible for identifying any or all such patent rights.
International Standard ISO 975 was prepared by Technical Committee ISO/TC 27, Solid mineral fuels,
Subcommittee SC 5, Methods of analysis.
This third edition cancels and replaces the second edition (ISO 975:1985), which has been technically revised.
© ISO 2000 – All rights reserved iii

---------------------- Page: 3 ----------------------
ISO 975:2000(E)
Introduction
The determination of yield of benzene-soluble extract is carried out using a semi-automatic instrument; a system
combining extraction, rinsing and evaporation. As long as the sample is put in the extraction chamber of the
instrument, the test can be done automatically.
iv © ISO 2000 – All rights reserved

---------------------- Page: 4 ----------------------
INTERNATIONAL STANDARD ISO 975:2000(E)
Brown coals and lignites — Determination of yield of benzene-
soluble extract — Semi-automatic method
1 Scope
This International Standard specifies a semi-automatic method for determination of the yield of benzene-soluble
extract in brown coals and lignites.
2 Normative reference
The following normative document contains provisions which, through reference in this text, constitute provisions of
this International Standard. For a dated reference, subsequent amendments to, or revisions of, the publication do
not apply. However, parties to agreements based on this International Standard are encouraged to investigate the
possibility of applying the most recent edition of the normative document indicated below. For an undated
reference, the latest edition of the normative document referred to applies. Members of ISO and IEC maintain
registers of currently valid International Standards.
ISO 5068:1983, Brown coals and lignites — Determination of moisture content — Indirect gravimetric method.
3Principle
A test portion of the brown coal or lignite is extracted with benzene in a semi-automatic extraction instrument. The
solvent is then removed by evaporation and the soluble residue dried to constant mass. The percentage of
benzene-soluble extract is calculated from the mass of residue after drying and is reported on the dry basis.
4 Reagent
Benzene, of analytical reagent grade, � = 0,876 g/ml, distillation range 80 °Cto 81 °C. At least 95 % shall distil
20
within this range.
WARNING — Benzene is flammable and toxic by inhalation, ingestion or skin absorption.
The test must be carried out in a hood and the benzene must be recovered as completely as possible.
5 Apparatus
5.1 Semi-automatic extraction instrument, containing mainly two units: the continuous extraction-evaporation
device and the controller. The continuous extraction-evaporation device consists of a 100 ml conical flask, an
extraction chamber and a condenser. The extraction chamber is 180 mm long and 30 mm in internal diameter and
is provided with a water jacket through which the bath water is circulated in order to maintain the extraction
temperature around the extraction chamber.
5.2 Extraction thimble, 25 mm � 80 mm. Cellulose or other thimbles are purchased or made as follows.
© ISO 2000 – All rights reserved 1

---------------------- Page: 5 ----------------------
ISO 975:2000(E)
Cut filter paper into pieces of 75 mm � 75 mm and 25 mm � 25 mm. Moisten one large piece of the filter paper with
distilled water and roll it snugly onto the external wall of a test tube of 25 mm diameter with a small hole pierced at
the bottom. A small piece of filter paper is next moistened and rolled onto the bottom. Three large pieces and two
small pieces are then rolled alternately onto the test tube. Remove the
...

SLOVENSKI STANDARD
SIST ISO 975:2002
01-junij-2002
5MDYLSUHPRJLLQOLJQLWL'RORþHYDQMHL]NRULVWNDHNVWUDNWDWRSQHJDYEHQ]HQX
3RODYWRPDWVNDPHWRGD
Brown coals and lignites -- Determination of yield of benzene-soluble extract -- Semi-
automatic method
Charbons bruns et lignites -- Détermination du rendement en extrait de benzène soluble
-- Méthode semi-automatique
Ta slovenski standard je istoveten z: ISO 975:2000
ICS:
73.040 Premogi Coals
SIST ISO 975:2002 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

---------------------- Page: 1 ----------------------

SIST ISO 975:2002

---------------------- Page: 2 ----------------------

SIST ISO 975:2002
INTERNATIONAL ISO
STANDARD 975
Third edition
2000-10-01
Brown coals and lignites — Determination
of yield of benzene-soluble extract —
Semi-automatic method
Charbons bruns et lignites — Détermination du rendement en extrait de
benzène soluble — Méthode semi-automatique
Reference number
ISO 975:2000(E)
©
ISO 2000

---------------------- Page: 3 ----------------------

SIST ISO 975:2002
ISO 975:2000(E)
PDF disclaimer
This PDF file may contain embedded typefaces. In accordance with Adobe's licensing policy, this file may be printed or viewed but shall not
be edited unless the typefaces which are embedded are licensed to and installed on the computer performing the editing. In downloading this
file, parties accept therein the responsibility of not infringing Adobe's licensing policy. The ISO Central Secretariat accepts no liability in this
area.
Adobe is a trademark of Adobe Systems Incorporated.
Details of the software products used to create this PDF file can be found in the General Info relative to the file; the PDF-creation parameters
were optimized for printing. Every care has been taken to ensure that the file is suitable for use by ISO member bodies. In the unlikely event
that a problem relating to it is found, please inform the Central Secretariat at the address given below.
© ISO 2000
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 either ISO at the address below or ISO's member body
in the country of the requester.
ISO copyright office
Case postale 56 � CH-1211 Geneva 20
Tel. + 41 22 749 01 11
Fax + 41 22 749 09 47
E-mail [e-mail]
Web www.iso.ch
Printed in Switzerland
ii © ISO 2000 – All rights reserved

---------------------- Page: 4 ----------------------

SIST ISO 975:2002
ISO 975:2000(E)
Foreword
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.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 3.
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.
Attention is drawn to the possibility that some of the elements of this International Standard may be the subject of
patent rights. ISO shall not be held responsible for identifying any or all such patent rights.
International Standard ISO 975 was prepared by Technical Committee ISO/TC 27, Solid mineral fuels,
Subcommittee SC 5, Methods of analysis.
This third edition cancels and replaces the second edition (ISO 975:1985), which has been technically revised.
© ISO 2000 – All rights reserved iii

---------------------- Page: 5 ----------------------

SIST ISO 975:2002
ISO 975:2000(E)
Introduction
The determination of yield of benzene-soluble extract is carried out using a semi-automatic instrument; a system
combining extraction, rinsing and evaporation. As long as the sample is put in the extraction chamber of the
instrument, the test can be done automatically.
iv © ISO 2000 – All rights reserved

---------------------- Page: 6 ----------------------

SIST ISO 975:2002
INTERNATIONAL STANDARD ISO 975:2000(E)
Brown coals and lignites — Determination of yield of benzene-
soluble extract — Semi-automatic method
1 Scope
This International Standard specifies a semi-automatic method for determination of the yield of benzene-soluble
extract in brown coals and lignites.
2 Normative reference
The following normative document contains provisions which, through reference in this text, constitute provisions of
this International Standard. For a dated reference, subsequent amendments to, or revisions of, the publication do
not apply. However, parties to agreements based on this International Standard are encouraged to investigate the
possibility of applying the most recent edition of the normative document indicated below. For an undated
reference, the latest edition of the normative document referred to applies. Members of ISO and IEC maintain
registers of currently valid International Standards.
ISO 5068:1983, Brown coals and lignites — Determination of moisture content — Indirect gravimetric method.
3Principle
A test portion of the brown coal or lignite is extracted with benzene in a semi-automatic extraction instrument. The
solvent is then removed by evaporation and the soluble residue dried to constant mass. The percentage of
benzene-soluble extract is calculated from the mass of residue after drying and is reported on the dry basis.
4 Reagent
Benzene, of analytical reagent grade, � = 0,876 g/ml, distillation range 80 °Cto 81 °C. At least 95 % shall distil
20
within this range.
WARNING — Benzene is flammable and toxic by inhalation, ingestion or skin absorption.
The test must be carried out in a hood and the benzene must be recovered as completely as possible.
5 Apparatus
5.1 Semi-automatic extraction instrument, containing mainly two units: the continuous extraction-evaporation
device and the controller. The continuous extraction-evaporation device consists of a 100 ml conical flask, an
extraction chamber and a condenser. The extraction chamber is 180 mm long and 30 mm in internal diameter and
is provided with a water jacket through which the bath water is circulated in order to maintain the extraction
temperature around the extraction chamber.
5.2 Extraction thimble, 25 mm � 80 mm. Cellulose or other thimbles are purchased or made as follows.
© ISO 2000 – All rights reserved 1

---------------------- Page: 7 ----------------------

SIST ISO 975:2002
ISO 975:2000(E)
Cut filter paper into pieces of 75 mm � 75 mm and 25 mm � 25 mm. Moisten on
...