ISO 1389-10:1977
Phthalic anhydride for industrial use — Methods of test — Part 10: Determination of 1,4- naphthaquinone content — Colorimetric method
Phthalic anhydride for industrial use — Methods of test — Part 10: Determination of 1,4- naphthaquinone content — Colorimetric method
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Phthalic anhydride for industrial use — Methods of test — Part 10: Determination of 1,4- naphthaquinone content — Colorimetric method
The principle consists in the development of a pink colour by heating a test portion containing 1,4-naphtoquinone with tin(II) chloride, and comparison of the colour produced with a series of prepared reference colours. – ISO 1389, Parts 1 to 11, replace ISO Recommendation R 1389-1970.
| Edition | 1977 |
|---|---|
| Standard Part No | 10 |
| Published Date | 1977 |
| Published By | International Standardization Organisation |
| Page Count | 2 |