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ISO 1391-4:1976 PDF
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Paraformaldehyde for industrial use — Methods of test — Part 4: Determination of water-insoluble matter
The principle of the procedure consists in the dissolution of a test sample in a highly diluted sodium hydroxide solution, filtration by using a tared filter crucible, drying of the residue at (100 2) °C. Determination of the in water insoluble substances by differences. – ISO 1391, Parts 1 to 4, replace ISO Recommendation R 1391-1970.
| Edition | 1976 |
|---|---|
| Standard Part No | 4 |
| Published Date | 1976 |
| Published By | International Standardization Organisation |
| Page Count | 1 |
