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IS0
I N T ERN AT I O N A L ORGANIZATION FOR STANDARD IZATl ON
IS0 R ECO M M EN DATI O N
R 739
SODIUM CARBONATE FOR INDUSTRIAL USE
PREPARATION AND STORAGE OF TEST SAMPLES
1st EDITION
May 1968
COPYRIGHT RESERVED
The copyright of IS0 Recommendations and IS0 Standards
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 739, Sodium carbonate for industrial use - Preparation and stor-
age of test samples. was drawn up by Technical Committee ISO/TC 47, Chemistry, the Secretariat
of which is held by the Ente Nazionale Italian0 de Unificazione (UNI).
Work on this question by the Technical Committee began in 1951 and led, in 1956, to the
adoption of a Draft IS0 Recommendation.
In June 1966, this Draft IS0 Recommendation (No. 1005) 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 :
Argentina Italy Switzerland
Austria Japan Turkey
Belgium Korea, Rep. of U.A.R.
Brazil Nether
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