Tritolyl phosphate for industrial use — List of methods of test
Specifies the sampling, the determination of the density at 20 0C, of the water content, of the acidity to phenol red, of apparent free phenols content and the measurement of colour in Hazen units.
Tritolyl phosphate for industrial use — Determination of acidity to phenol red — Volumetric method
Specifies the titration of any acidity present in an ethanolic solution with standard volumetric sodium hydoxide solution in the presence of phenol red as indicator. The end point of the titration corresponds to the formation of the salt Na2 HPO4 .
Tritolyl phosphate for industrial use — Determination of apparent free phenols content — Volumetric ...
The method specified determines only those phenols capable of reacting at the 2nd, 4th and 6th position (-OH = 1). The procedure consists in extraction of free phenols from a test portion with sodium hydroxide solution. Bromination of these phenols with potassium bromide-bromate solution in an acid medium and determination of the excess bromine after reaction with potassium iodide by titration…
Adipate esters for industrial use — List of methods of test
Specifies the sampling, the determination of the density at 20 0C, of the water content, of the acidity to phenolphthalein, of the ash and esther contents, the measurement of colour in Hazen units and of the colour after the heat treatment.
Adipate esters for industrial use — Measurement of colour after heat treatment
The method specified is applicable to simple and mixed alcohol esters that are liquid at ambient temperature. The heat treatment is carried out in a tube of borosilicate glass in an oil bath at a temperature of (180 2) 0C for 2 h. Measurement of the colour of the heat-treated sample by the method specified in ISO 2211.
Adipate esters for industrial use — Determination of ash — Gravimetric method
The method is applicable to simple and mixed alcohol esters that are liquid at ambient temperature. The principle of analysis consists in burning a test portion in a platinum or silica dish and ignition in a muffle furnace controlled at (600 30) 0C. Weighing of the residue.
Adipate esters for industrial use — Determination of ester content — Volumetric method
The method is applicable to simple and mixed alcohol esters that are liquid at ambient temperature. The following principle is specified: Saponification of the ester using potassium hydroxide in ethanolic solution followed by titration with standard volumetric hydrochloric acid solution in the presence of phenolphthalein as indicator. In the case of mixed alcohol esters the relative molar mass of…
Sulphuric acid and oleums for industrial use — Determination of ammoniacal nitrogen content — Spectr...
Applicable to products having contents of more than 0.0001 % (m/m). The procedure described is suitable for contents between 0.0001 % (m/m) and 0.0005 % (m/m). It bases on distillation, with entrainment by steam, of the ammonia in the presence of an excess of sodium hydroxide and collection of the distillate in an excess of acid solution. Neutralization of the dexcess of acid and formation of the…
Nitric acid for industrial use — Evaluation of the nitric acid concentration by measurement of densi...
Describes the determination of density at 20 °C by means of a hydrometer. The correspondence between density and concentration of aqueous solutions is given in a table. Has also been approved by the IUPAC.