ISO 1389-5:1977
$11.05
Phthalic anhydride for industrial use — Methods of test — Part 5: Determination of free acidity — Potentiometric method
| Published By | Publication Date | Number of Pages |
| ISO | 1977-02 | 4 |
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.
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