ISO 1389-5:1977
Phthalic anhydride for industrial use — Methods of test — Part 5: Determination of free acidity — Potentiometric method
Phthalic anhydride for industrial use — Methods of test — Part 5: Determination of free acidity — Potentiometric method
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Phthalic anhydride for industrial use — Methods of test — Part 5: Determination of free acidity — Potentiometric method
The principle of the method consists in the potentiometric titration of a test portion not exceeding 10 g and containing not more than 0.150 g of phthalic acid, with a standard volumetric solution of triethylamine in anhydrous butanone. – ISO 1389, Parts 1 to 11, replace ISO Recommendation R 1389-1970.
| Edition | 1977 |
|---|---|
| Standard Part No | 5 |
| Published Date | 1977 |
| Published By | International Standardization Organisation |
| Page Count | 2 |