Phthalic anhydride for industrial use — Methods of test — Part 4: Measurement of colour after treatm...
The test sample is treated with sulphuric acid solution in a conical flask in boiling water bath for 3 h. The colour is measured by the method specified in ISO 2211. The results are expressed in Hazen units. - ISO 1389, Parts 1 to 11, replace ISO Recommendation R 1389-1970.
Phthalic anhydride for industrial use — Methods of test — Part 5: Determination of free acidity — Po...
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.
Phthalic anhydride for industrial use — Methods of test — Part 6: Determination of phthalic anhydrid...
The principle consists in the dissolution of a test portion in an excess of standard volumetric sodium hydroxide solution and back-titration of the excess with a standard volumetric hydrochloric acid solution using phenolphthalein as indicator. - ISO 1389, Parts 1 to 11, replace ISO Recommendation R 1389-1970.
Phthalic anhydride for industrial use — Methods of test — Part 7: Determination of maleic anhydride ...
The principle consists in the dissolution of a test portion in acetone, removal of 1,4-naphthoquinone present in the solution by extraction with benzene. Polarographic measurement of the aqueous solution and determination of the mass of maleic anhydride by means of the calibration graph. - ISO 1389, Parts 1 to 11, replace ISO Recommendation R 1389-1970.
Phthalic anhydride for industrial use — Methods of test — Part 8: 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. - ISO 1389, Parts 1 to 11, replace ISO Recommendation R 1389-1970.
Phthalic anhydride for industrial use — Methods of test — Part 9: Determination of impurities oxidiz...
This method is not specific for maleic anhydride. The polarographic method specified in part 7 should be used. The principle is based on the oxidation of unsaturated organic acids and anhydrides in a test portion with an excess of cold standard volumetric potassium permanganate solution in the presence of sulphuric acid, followed by iodometric determination of the potassium permanganate remaining…
Phthalic anhydride for industrial use — Methods of test — Part 10: Determination of 1,4- naphthaquin...
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.
Phthalate esters for industrial use — Methods of test — Part 1: General
The document also specifies the methods to be used for the following tests: measurements of colour; determination of density at 20 °C; determination of water content; determination of iodine value (applicable to diallyl phthalate only); determination of refractive index; determination of flash point; determination of viscosity (not applicable to diallyl phthalate). - ISO 1385, Part 1 to Part 5…
Phthalate esters for industrial use — Methods of test — Part 2: Measurement of colour after heat tre...
The method is not applicable to diallyl phthalate because of the risk of explosive polymerization. The procedure is carried out by the method specified in ISO 2211. The result is expressed in Hazen units (platinum-cobalt scale). - ISO 1385, Part 1 to Part 5 replace ISO Recommendation R 1385-1970.
Phthalate esters for industrial use — Methods of test — Part 3: Determination of ash
With diallyl phthalate, this method of test should be carried out cautiously and only small amounts should be ignited at one time because of the risk of explosive polymerization. The principle consists in burning of a test portion and heating in an electric furnace at (600 30) °C to constant mass. - ISO 1385, Part 1 to Part 5 replace ISO Recommendation R 1385-1970.
