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IS0
INTERN AT1 ON AL ORGAN I Z AT I O N FOR S TA N DA RDlZATl O N
IS0 RECOMMENDATION
R 607
SURFACE ACTIVE AGENTS IN POWDER FORM
PREPARATION OF A REDUCED SAMPLE
1 st EDITION
July 1967
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The copyright of IS0 Recommendations and IS0 Standards
belongs to IS0 Member Bodies. Reproduction of these
documents, in any country, may be authorkd 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 607, Surface Active Agents in Powder Form - Preparation
of a Reduced Sample, was drawn up by Technical Committee ISO/TC 91, Surface Active Agents,
the Secretariat of which is held by the Association Française de Normalisation (AFNOR).
Work on this question by the Technical Committee began in 1961 and led, in 1963, to the
adoption of a Draft IS0 Recommendation.
In September 1965, this Draft IS0 Recommendation (No. 835) 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 France Portugal
Austria Germany Republic of South Africa
Belgium Hungary Romania
Brazil Ir e 1 and Spain
Switzerland
Canada Italy
Japan U.A.R.
Chile
Colombia Netherlands United Kingdom
Czechoslovakia Poland Yugoslavia
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 1967, to accept it as an IS0 RECOMMENDATION.
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ISO/R 607 - 1967 (E)
IS0 Recommendation R 607 July 1967
SURFACE ACTIVE AGENTS IN POWDER FORM
PREPARATION OF A REDUCED SAMPLE
1. SCOPE
This IS0 Recommendation describes a method which enables a reduced sample of a mass
over 250 g to be obtained from a bulk sample of surface active agent in powder form, and
enables the reduced sample to be divided into a desired number of laboratory samples.
The method applies to powders, including spray-dried powders, particularly when they contain
additives which have been introduced after the drying process. The physical mixture obtained
in the latter case has a tendency to separate.
2. PRINCIPLE
Reduction of a bulk sample by a mechanical process until a reduced sample is obtained.
3. APPARATUS
The apparatus should be constructed in s
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