Furfural for industrial use — List of methods of test
Specifies the sampling, determination of distillation characteristics, density at 20 0C, water content, total carbonyl compounds and the acidity to phenolphtalein.
Furfural for industrial use — Determination of total carbonyl compounds — Volumetric method
Reaction between hydroxylammonium chloride and carbonyl groups in a test portion, followed by determination of the hydrochloric acid liberated by titration with standard volumetric sodium hydroxide solution in the presence of bromophenol blue as indicator.
Acetaldehyde for industrial use — Determination of density at 15 degrees C
Prescribes that samples shall be taken in clean stainless steel flasks purged with nitrogen. The low boiling point at 20.2 0C makes difficult the determination of density at 20 0C, therefore, the determination is specified at 15 0C. The procedure is performed according to the method given in ISO 758.
Acetaldehyde for industrial use — Determination of water content — Karl Fischer method
Prescribes that samples shall be taken in clean stainless steel flasks purged with nitrogen. Samples shall only be drawn at temperatures below 20 0C. The Process uses the method of the electrometric titration according to ISO 760. Either dimethylformamide or a mixture of dimethylformamide and pyridine is used for the sample solvent.
Methyl ethyl ketone for industrial use — Examination for residual odour
The principle of examination is the comparison of the odour of the sample with that of an agreed reference standard. If there is no odour after the butanone has been evaporated the product is without any residual odour.
Diacetone alcohol for industrial use — List of methods of test
Specifies the sampling, the determination of distillation characteristics, of the density at 20 0C, of residue on evaporation on a water bath, of the water content, of the acidity to phenolphthalein, the test of miscibility with water and the measurement of colour in Hazen units.
Hexylene glycol for industrial use — List of methods of test
Specifies the sampling, the determination of distillation characteristics, of the density at 20 0C, of the water content, of the acidity to phenolphthalein, the test of miscibility with water and the measurement of colour in Hazen units.
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 .
