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IS0
INTERNATIONAL ORGANIZATION FOR STANDARDIZATION
IS0 R ECOM MEN DATI O N
R 314
METHODS OF CHEMICAL ANALYSIS OF MANGANESE ORES
DETERMINATION OF CARBON DIOXIDE
1 st EDITION
July 1963
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belongs to IS0 Member Bodies. Reproduction of these
documents, in any country, may be authorized therefore only
by the national standards organization of that country, being
a member of ISO.
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 314, Methods of Chemical Analysis of Manganese Ores-
Determination of Carbon Dioxide, was drawn up by Technical Committee ISO/TC 65,
Manganese Ores, the Secretariat of which is held by the Komitet Standartov, Mer i Izme-
ritel'nyh Priborov pri Sovete Ministrov SSSR.
Work on this question by the Technical Committee began in 1954 and led, in 1957,
to the adoption of a Draft IS0 Recommendation.
In October 1958, this Draft IS0 Recommendation (No. 247) was circulated to ail the
IS0 Member Bodies for enquiry. It was approved by the following Member Bodies:
Germany Poland
Austria
Bulgaria Hungary Portugal
Burma India Republic of South Africa
Chile Ireland Romania
Czechoslovakia Italy Spain
Finland Japan United Kingdom
France Netherlands U. S. S. R.
No Member Body opposed the approval of the Draft.
The Draft IS0 Recommendation was then submitted by correspondence to the IS0
Council, which decided, in July 1963, to accept it as an IS0 RECOMMENDATION.
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I
iSO/ R 314 - 1963 (E)
IS0 Recommendation R 314 July 1963
METHODS OF CHEMICAL ANALYSIS OF MANGANESE ORES
DETERMINATION OF CARBON DIOXIDE
(Atomic mass C : 12.01; molecular mass CO, : 44.01)
This IS0 Recommendation contains two parts:
I. Introduction . section 1,
II. Gravimetric method . sections 2 to 5.
I. INTRODUCTION
1. GENERAL INSTRUCTIONS
1.1 In the following analysis, use a sample for chemical analysis of air-dried manganese ore,
which has been crushed to a size not exceeding 0.10 mm and checked on a sieve of appropriate
size.
Simultaneously with the collection of samples for the determination of carbon dioxide,
take three more test samples for the determination of hygroscopic moisture.
Calculate the content of carbon dioxide in ore which is absolutely dry by multiplying the
numerical results of the determination of carbon dioxide by the conversion factorK, as
found from the following formula:
1 O0
K= -
100-A
where A = hygroscopic moisture content, per cent.
1.2 'The determination of carbon dioxide in manganese ore is carried out by simultaneously
analysing three samples of ore, with two blank determinations to enable a corresponding
correction in the result of the determination to be made.
Simultaneously and under the same conditions, carry out a check analysis of a standard
sample of manganese ore, for carbon dioxide content.
The arithmetical mean of the three results is accepted as the final result.
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IS0 / R 314- 1963 (E)
The following conditions should be observed :
The maximum difference between the highest and the lowest results should not exceed
double the absolute value of the permissible tolerance on the result of the analysis (for the
corresponding interval of carbon dioxide content), shown in the table under clause 5.2,
“ Accuracy of method ”.
The average result of the simultaneous check analysis of the standard sample of manganese
ore for carbon dioxide content should not differ from the result shown in the certificate
by more than the value of the permissible tolerance (for the corresponding interval of
carbon dioxide content), shown in the table under clause 5.2, “Accuracy of method”.
For the analysis, take a standard sample of the type of ore to which the sample being analysed
belongs.
1.3 The samples and the residues should be weighed to an accuracy of f 0.0002 g.
1.4 Distilled water should be used during the procedure and for the preparation of solutions.
1.5 indications as to the concentration of solutions show the quantity of solute (in grammes)
in the corresponding volume of the solvent.
1.6 The following symbols and abbreviations are used :
d relative den
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