Aluminium ores — Determination of iron content — Titrimetric method
The method ist applicable to ores containing between 2 and 50 % (m/m) iron oxide. The method has been chosen to avoid interference from platinum which may occur with the use of platinum crucibles. Specifies principle, reagents, apparatus, sampling and preparation of samples, procedure, expression of results and test report.
Liquefied anhydrous ammonia for industrial use — Determination of oil content — Gravimetric and infr...
A test portion is evaporated at ambient temperature and the oil contained in the residue is extracted with carbon tetrachloride. The oil contained in the residue is determined either gravimetrically by evaporation of the organic solvent and weighing of the residue or by spectrometric measurement of the absorbance of the organic phase at a wavelength of approximately 3.42 m. The gravimetric method…
Carbonaceous materials for the production of aluminium — Calcined coke — Determination of apparent o...
A test portion is heated in a non-oxidizing atmosphere at a fixed temperature and the loss of mass is determined. The apparent oil content is calculated in terms of loss of mass. To ensure a non-oxidizing atmosphere, some drops of toluene are added to the crucibles.
Cheese and processed cheese — Determination of total solids content (Reference method)
Specifies a method, the principle of which consists in evaporatiing the water from a test portion in the presence of sand at a temperature of 102 +/- 2 degrees centigrade in a drying oven. The content determined is expressed as a percentage by mass.
Ammonia solution for industrial use — Determination of ammonia content — Titrimetric method
A test portion is introduced into a solution of boric acid and the solution obtained is titrated with a standard volumetric solution of sulfuric acid in the presence of methyl red as indicator. The method is applicable to solutions containing not more than 35 % (m/m) of ammonia.
Liquefied anhydrous ammonia for industrial use — Determination of water content — Karl Fischer metho...
A test portion is evaporated in the presence of ethanediol and the water content of the residue is determined by the Karl Fischer method with direct electrometric measurement. The method is applicable to products having water contents equal to or greater than 50 mg/kg. For water contents greater than 1000 mg/kg it is preferable to dilute the evaporation residue with anhydrous methanol in…
Rubber — Reinforced styrene-butadiene latex — Determination of total bound styrene content
Covers two methods for latices which are reinforced with polystyrene or copolymer of butadiene and styren. The two methods, the carbon/hydrogen method and the nitration method, give comparable results although they differ in principle. Either method may be used, according to preference. A table and five figures contain more details. - Constitutes a minor revision of the first edition (ISO 4655-…
Rubber seals — Joint rings used for petroleum product supply pipes and fittings — Specification for ...
Specifies requirements, but does not apply to the mentioned product with an aromatic content higher than 30 % and liquids polluted by petroleum traces. Other requirements shall be specified in national standards. Iron, steel, copper, plastics are included as pipeline materials. Not included are joint rings made of cellular rubbers. 2 tables with general and optional requirements.
Hardmetals — Chemical analysis by flame atomic absorption spectrometry — Part 6: Determination of ch...
General requirements concerning the field of application, principle, interfering elements, apparatus, sampling and test report are given in ISO 7627-1.
