BS ISO 14887:2000
Current
The latest, up-to-date edition.
Sample preparation. Dispersing procedures for powders in liquids
Hardcopy , PDF
English
15-03-2001
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Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Symbols and abbreviated terms
5 Examination of the dry powder
6 Selection of a liquid and trial dispersion
7 Examination of the dispersion
8 Identification of possible dispersing agents
9 Optimization of the dispersion method
10 Maintenance of dispersion stability during sample
handling
Annex A (informative) Alternative dispersion-stability
tests
Annex B (informative) Commercial dispersing agents in the
various dispersing agent categories
Bibliography
Developed to help particle size analysts make good dispersions from liquid/powder combinations with which they are not experienced. This Standard provides procedures for: a) wetting a powder into a liquid b) deagglomerating the wetted clumps c) determining if solution composition can be adjusted to prevent reagglomeration d) selecting dispersing agents to prevent reagglomeration e)evaluating the stability of the dispersion against reagglomeration.
| Committee |
LBI/37
|
| DevelopmentNote |
Supersedes 99/402494 DC. (07/2005)
|
| DocumentType |
Standard
|
| Pages |
34
|
| PublisherName |
British Standards Institution
|
| Status |
Current
|
| Supersedes |
This International Standard was developed to help particle size analysts make good dispersions from powder/liquid combinations with which they are not experienced. It provides procedures for
-
wetting a powder into a liquid;
-
deagglomerating the wetted clumps;
-
determining if solution composition can be adjusted to prevent reagglomeration;
-
selecting dispersing agents to prevent reagglomeration;
-
evaluating the stability of the dispersion against reagglomeration.
This International Standard is applicable to particles ranging in size from approximately 0,05 to 100µm. It provides a series of questions on the nature of the powder and liquid involved. The answers are used with charts that guide the user to generic dispersing agents that are likely to be suitable for dispersing the powder in the liquid.
This International Standard applies only to the preparation of simple, dilute dispersions (less than 1%by volume solids) for particle size analysis. It does not deal with the formulation of complex and commercial mixtures highly loaded with solids, such as paints, inks, pharmaceuticals, herbicides and composite plastics.
| Standards | Relationship |
| ISO 14887:2000 | Identical |
| BS 8471:2007 | Guide to particle sizing methods |
| ASTM E 20 : 1985 | Practice for Particle Size Analysis of Particulate Substances in the Range of 0.2 to 75 UM by Optical Microscopy (Withdrawn 1994) |
| ISO 8780-1:1990 | Pigments and extenders — Methods of dispersion for assessment of dispersion characteristics — Part 1: Introduction |
| NFX 11 693 : 1983 FD | PARTICLE SIZE ANALYSIS - SUSPENDING LIQUIDS AND DISPERSING AGENTS |
| BS 3406(1963) : LATEST | |
| ISO 14703:2008 | Fine ceramics (advanced ceramics, advanced technical ceramics) — Sample preparation for the determination of particle size distribution of ceramic powders |
| ISO 8213:1986 | Chemical products for industrial use — Sampling techniques — Solid chemical products in the form of particles varying from powders to coarse lumps |
| ISO 9276-2:2014 | Representation of results of particle size analysis — Part 2: Calculation of average particle sizes/diameters and moments from particle size distributions |
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