Maleic anhydride for industrial use — Methods of test — Part 1: General
The document also specifies the method to be used for the determination of the crystallizing point. Before carrying out the tests, the sample shall be grind to a fine powder and shall be mixed thoroughly. Exposure to moist air may lead to the formation of maleic acid. - ISO 1390, Parts 1 to 6, replace ISO Recommendation R 1390-1970.
Maleic anhydride for industrial use — Methods of test — Part 2: Measurement of colour of the molten ...
The principle is based on the measurement of colour, by the method specified in ISO 2211, of a test portion in the molten state. The results are expressed in Hazen units. - ISO 1390, Parts 1 to 6, replace ISO Recommendation R 1390-1970.
Maleic anhydride for industrial use — Methods of test — Part 3: Determination of free acidity — Pote...
The procedure is based on the potentiometric titration of the free acidity in a test portion with a standard volumetric triethylamine solution in anhydrous methyl ethyl ketone (butanone). - ISO 1390, Parts 1 to 6, replace ISO Recommendation R 1390-1970.
Maleic anhydride for industrial use — Methods of test — Part 4: Determination of maleic anhydride co...
The principle consists in the dissolution of a test portion in diluted standard volumetric sodium hydroxide solution and titration with standard volumetric sodium hydroxide solution in presence of phenolphthalein as indicator. - ISO 1390, Parts 1 to 6, replace ISO Recommendation R 1390-1970.
Maleic anhydride for industrial use — Methods of test — Part 5: Determination of ash
The principle consists in burning a test portion and heating in a furnace controlled at (600 30) °C, until all carbonaceous matter has disappeared, to constant mass. The residue may be retained for the determination of iron. - ISO 1390, Parts 1 to 6, replace ISO Recommendation R 1390-1970.
Maleic anhydride for industrial use — Methods of test — Part 6: Determination of iron content — 2,2&...
The principle is based on the dissolution, in hot hydrochloric acid, of the residue from the determination of the ash of a test portion (see ISO 1390/5). Reduction, by hydroxylammonium chloride, of the iron(III) contained in the solution thus obtained, formation of the coloured complex iron(II)-2,2'bipyridyl in a buffered medium. Photometric measurement of the coloured complex at a…
Higher alcohols for industrial use — Methods of test — Part 6: Determination of ash
Relates to C6 to C13 alcohols. The principle of the method is based on burning of a test portion and heating in a platinum or silica dish at (600 +- 30) °C to constant mass. ISO 1843/6 replaces ISO Recommendation R 1851-1970.
Higher alcohols for industrial use — Methods of test — Part 1: General
Gives general instructions for C6 to C13 alcohols and also specifies the methods to be used for the measurement of the colour, the determination of the density at 20 °C and the determination of the water content.
