Solid mineral fuels -- Hard coal -- Determination of moisture in the general analysis test sample by drying in nitrogen

Combustibles minéraux solides -- Houille -- Détermination de l'humidité de l'échantillon pour analyse par dessiccation en atmosphère d'azote

Trdna fosilna goriva - Črni premog - Določevanje vlage v splošni analizi preskusnega vzorca s sušenjem v dušiku

General Information

Status
Replaced
Publication Date
21-Apr-1999
Withdrawal Date
21-Apr-1999
Current Stage
6060 - International Standard published
Start Date
19-Mar-1999
Completion Date
22-Apr-1999

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ISO 11722:1999 - Solid mineral fuels -- Hard coal -- Determination of moisture in the general analysis test sample by drying in nitrogen
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INTERNATIONAL ISO
STANDARD 11722
First edition
1999-05-01
Solid mineral fuels — Hard coal —
Determination of moisture in the general
analysis test sample by drying in nitrogen
Combustibles minéraux solides — Houille — Détermination de l'humidité de
l'échantillon pour analyse par dessiccation en atmosphère d'azote
Reference number
ISO 11722:1999(E)
---------------------- Page: 1 ----------------------
ISO 11722:1999(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.

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 11722 was prepared by Technical Commitee ISO/TC 27, ,
Solid mineral fuels
Subcommittee SC 5, Methods of analysis.
Annex A of this International Standard is for information only.
© 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
Internet iso@iso.ch
Printed in Switzerland
---------------------- Page: 2 ----------------------
© ISO
ISO 11722:1999(E)
Introduction

The determination of the moisture in the general analysis test sample is required to correct the results of certain

analytical determinations, e. g., volatile matter and hydrogen, for the effect of water in the determination and to allow

all determinations to be corrected to dry basis.

Since hard coal is hygroscopic, its moisture will vary with change of humidity of the atmosphere and the moisture in

the general analysis test sample should therefore be determined whenever portions are weighed out for other

analytical determinations. If test portions for several analytical determinations are weighed out at the same time, a

single simultaneous moisture determination will suffice to correct those analyses.

iii
---------------------- Page: 3 ----------------------
INTERNATIONAL STANDARD © ISO ISO 11722:1999(E)
Solid mineral fuels — Hard coal — Determination of moisture in the
general analysis test sample by drying in nitrogen
1 Scope

This International Standard specifies a method for determining the moisture in the general analysis test sample of

hard coal by drying in nitrogen.
2 Normative reference

The following normative document contains provisions which, through reference in this text, constitute provisions of

this International Standard. For dated references, subsequent amendments to, or revisions of, such documents 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 undated references,

the latest edition of the normative document referred to applies. Members of ISO and IEC maintain registers of

currently valid International Standards.

ISO 1213-2:1992, Solid mineral fuels — Vocabulary — Part 2: Terms relating to sampling, testing and analysis.

3 Definitions

For the purposes of this International Standard, the definitions given in ISO 1213-2 apply.

4 Principle

A known mass of the coal is heated in a stream of nitrogen at a temperature between 105 °C and 110 °C and

maintained at this temperature until it is constant in mass. The moisture content is calculated from the loss in mass

of the coal.
5 Reagent

Nitrogen, moisture-free, having an volume fraction of oxygen of less than 30 μl/l.

Commercially available nitrogen with a water content of less than 5 μl/l does not require further drying.

6 Apparatus
6.1 Analytical balance, capable of weighing to the nearest 0,1 mg.

6.2 Oven, capable of being controlled at a temperature of 105 °C to 110 °C and with provision for the nitrogen to

pass through it at a flow-rate of approximately 15 times the oven volume per hour and of lowest practical volume,

i.e. minimum free space.
NOT
...

SLOVENSKI STANDARD
SIST ISO 11722:2000
01-junij-2000
7UGQDIRVLOQDJRULYDýUQLSUHPRJ'RORþHYDQMHYODJHYVSORãQLDQDOL]L
SUHVNXVQHJDY]RUFDVVXãHQMHPYGXãLNX

Solid mineral fuels -- Hard coal -- Determination of moisture in the general analysis test

sample by drying in nitrogen

Combustibles minéraux solides -- Houille -- Détermination de l'humidité de l'échantillon

pour analyse par dessiccation en atmosphère d'azote
Ta slovenski standard je istoveten z: ISO 11722:1999
ICS:
73.040 Premogi Coals
SIST ISO 11722:2000 en

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

---------------------- Page: 1 ----------------------
SIST ISO 11722:2000
---------------------- Page: 2 ----------------------
SIST ISO 11722:2000
INTERNATIONAL ISO
STANDARD 11722
First edition
1999-05-01
Solid mineral fuels — Hard coal —
Determination of moisture in the general
analysis test sample by drying in nitrogen
Combustibles minéraux solides — Houille — Détermination de l'humidité de
l'échantillon pour analyse par dessiccation en atmosphère d'azote
Reference number
ISO 11722:1999(E)
---------------------- Page: 3 ----------------------
SIST ISO 11722:2000
ISO 11722:1999(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.

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 11722 was prepared by Technical Commitee ISO/TC 27, ,
Solid mineral fuels
Subcommittee SC 5, Methods of analysis.
Annex A of this International Standard is for information only.
© 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
Internet iso@iso.ch
Printed in Switzerland
---------------------- Page: 4 ----------------------
SIST ISO 11722:2000
© ISO
ISO 11722:1999(E)
Introduction

The determination of the moisture in the general analysis test sample is required to correct the results of certain

analytical determinations, e. g., volatile matter and hydrogen, for the effect of water in the determination and to allow

all determinations to be corrected to dry basis.

Since hard coal is hygroscopic, its moisture will vary with change of humidity of the atmosphere and the moisture in

the general analysis test sample should therefore be determined whenever portions are weighed out for other

analytical determinations. If test portions for several analytical determinations are weighed out at the same time, a

single simultaneous moisture determination will suffice to correct those analyses.

iii
---------------------- Page: 5 ----------------------
SIST ISO 11722:2000
---------------------- Page: 6 ----------------------
SIST ISO 11722:2000
INTERNATIONAL STANDARD © ISO ISO 11722:1999(E)
Solid mineral fuels — Hard coal — Determination of moisture in the
general analysis test sample by drying in nitrogen
1 Scope

This International Standard specifies a method for determining the moisture in the general analysis test sample of

hard coal by drying in nitrogen.
2 Normative reference

The following normative document contains provisions which, through reference in this text, constitute provisions of

this International Standard. For dated references, subsequent amendments to, or revisions of, such documents 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 undated references,

the latest edition of the normative document referred to applies. Members of ISO and IEC maintain registers of

currently valid International Standards.

ISO 1213-2:1992, Solid mineral fuels — Vocabulary — Part 2: Terms relating to sampling, testing and analysis.

3 Definitions

For the purposes of this International Standard, the definitions given in ISO 1213-2 apply.

4 Principle

A known mass of the coal is heated in a stream of nitrogen at a temperature between 105 °C and 110 °C and

maintained at this temperature until it is constant in mass. The moisture content is calculated from the loss in mass

of the coal.
5 Reagent
Nitrogen, moisture-free, having an volume fra
...

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