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IS0
1 N T E R N AT1 O N AL OR GAN 1 Z AT1 O N
F OR STAN DAR D 1 Z AT1 O N
IS0 RECOMMENDATION
R 579
DETERMINATION OF TOTAL MOISTURE IN COKE
1st EDITION
April 1967
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For each individual country the only valid standard is the national standard of that country.
Printed in Switzerland
Also issued in French and Russian. Copies to be obtained through the national standards organizations.
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BRIEF HISTORY
The IS0 Recommendation R 579, Determination of Total Moisture in Coke, was drawn
up by Technical Committee ISO/TC 27, Solid Mineral Fuels, the Secretariat of which is held
by the British Standards Institution (BSI).
Work on this question by the Technical Committee began in 1958 and led, in 1963, to the
adoption of a Draft IS0 Recommendation.
In March 1964, this Draft IS0 Recommendation (No.681) was circulated to all the IS0
Member Bodies for enquiry. It was approved, subject to a few modifications of an editorial nature,
by the following Member Bodies :
Australia Denmark Romania
Austria France Switzerland
Belgium Germany Turkey
Brazil
India U.A.R.
Canada Italy United Kingdom
Chili Korea, Rep. of U.S.A.
Colombia New Zealand U.S.S.R.
Czechoslovakia Poland
One Member Body opposed the approval of the Draft:
Republic of South Africa
The Draft IS0 Recommendation was then submitted by correspondence to the IS0
Council, which decided, in April 1967, to accept it as an IS0 RECOMMENDATION.
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IÇOIR 579 - 1967 (E)
IS0 Recommendation R 579 April 1967
DETERMINATION OF TOTAL MOISTURE IN COME
1. SCOPE
This IS0 Recommendation describes the method of determining the total moisture in coke.
2. PRINCIPLE
A sample of the coke is heated in air at 200 "C (see Note 1) and maintained at this temperature
until constant in mass. The percentage moisture content is calculated from the loss in mass of
the sample. Coke is not liable to oxidation under the conditions recommended.
3. APPARATUS
3.1 Air oven, capable of maintaining a substantially uniform temperature zone at 200 "C (see
Note I) and in which the rate of atmosphere change is sufficiently rapid (see Note 2).
3.2 Tray, approximately 1000 cm2 in area and 2.5 cm deep, made of non-corrodible material
such as stainless steel, tinned steel or aluminium.
3.3 Weighing machine, sensitive to 1 g (see Note 3).
4. SAMPLE
The sample should consist of 1 kg of coke (see Note 3), prepared in accordance with the relevant
c
IS0 Recommendation*, and should be received in a sealed air-tight container. During the course
of its preparation the sample may have been air dried, in which case a formula is used to calculate
the total moisture content (see Note 4).
5. PROCEDURE
Weigh the sample and container as received to the nearest 0.1 %. Weigh the dry, empty tray,
transfer the sample as completely as possible to the tray and spread evenly. Place the charged
tray in the oven at a temperature of 200 "C (see Note I). Dry the wet container with any sample
adhering to it by warming, transfer the remaining sample to the tray and weigh the dry empty
container (see Note 5). Heat the tray and its contents until constant in mass (see Note 6), weighing
the tray hot to avoid absorption of moisture during cooling.
* The IS0 Recommendation on the sampling of coke is in course of preparation; in
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