Plastics — Phenol-formaldehyde mouldings — Determination of free ammonia and ammonium compounds — Co...
Specification of a semi-quantitative method. The content of free ammonia in a moulded article is of importance, when corrosion of metal inserts or contamination in contact with the article has to be considered. Distillation of the aqueous extract from a powdered test portion, coloration of the distillate by reaction with Nessler reagent and comparison of the colour with that of standard matching…
Oilseed residues — Determination of moisture and volatile matter content
The method consists in drying of a test portion at 103 + 2 C in an oven at atmosphere pressure, until practically constant mass is reached. It applies to residues ( excluding compounded products) obtained by the extraction by pressure or solvent. It cancels and replaces ISO Recommendation R 771-1968.
Aluminium oxide primarily used for the production of aluminium — Determination of titanium content —...
Applicable to all products having a titanium dioxide content of equal to or more than 0.001 % (m/m). Describes the preparation of the diantipyrylmethane solution and the preparation of the titanum standard solution. The procedure of the preparation of a principal solution or the chemical analysis by an alkaline fusion is carried out according to ISO 804 replacing the nitric acid solution by the…
Magnesium and its alloys — Determination of nickel — Photometric method using dimethylglyoxime
The method is applicable to the determination of nickel contents between 0,000 5 and 0,05 % (m/m). Specifies principle, reagents, apparatus, sampling, procedure, expression of results and test report.
Washing powders — Determination of active oxygen content — Titrimetric method
The determination consists in co-reduction, with liberation of oxygen, of the peroxyhydrate and potassium permanganate in an acid solution. Because of the specifity of washing powders and the relative stability of peroxyhydrates, the dissolution of washing powders is likely to be incomplete and may result in a loss of oxygen; these disadvantages have been avoited by adoption of a particular…
Soaps — Determination of chlorides content — Potentiometric method
The method is carried out as follows: Potentiometric titration of the chloride ions with standard volumetric silver nitrate solution in a nitric acid medium, using a silver-silver chloride measurement electrode and a calomel reference electrode.
Plastics — Determination of apparent density of material that can be poured from a specified funnel
Specifies a method for the determination of the apparent density of a moulding powder or a granular material. The sample is pured through a specified funnel into a measuring cylinder of 100 cubiccentimeter capacity, the excess is removed with a straightedge and the mass of the contents is determinded by weighing. Expression of the apparent density in grams per millilitre.
Starches, native or modified — Determination of total fat content
Hydrolysis of the product by boiling hydrochloric acid, and coagulation of the insoluble products by cooling. Separation by filtration, drying and isolation the wanted matter by solvent extraction. The method applies to contents less than 1,5 % (m/m).
