Instant tea — Determination of free-flow and compacted bulk densities
The method for the determination of the free-flow bulk density consists in pouring a sample from a specified funnel into a specified receptacle of known volume, and weighing the contents of the receptacle. The determination of the compacted bulk density consists in determining of the volume of a given mass of the product after a fixed number of taps (usually 100) in a jogging volumeter.
Methyl chloride for industrial use — Determination of impurities — Gas chromatographic methods
Specifies a method, the principle of which is based on the analysis of a vaporzed test portion and determination of the contents of impurities. The calibration factors used for this determination are obtained by analysis of external methyl chloride calibration mixtures containing known quantities of the impurities under consederation.
Pulps — Determination of manganese content — Sodium periodate photometric and flame atomic absorptio...
Specifies two methods based on the ashing of the pulp and the disolution of the ash in hydrochloric acid, both of them being applicable to all kinds of pulp.
Manganese ores and concentrates — Determination of phosphorus content — Extraction-molybdovanadate p...
The method is applicable to products having phosphorus contents from 0,02 to 0,5 % (m/m). ISO 4293 should be read in conjunction with ISO 4297. Specifies principle, reagents, apparatus, sample, procedure and expression of results.
Chemical products for industrial use — General method for determination of iron content — 1,10-Phena...
All the iron(III) present in the test solution is reduced to iron(II) with ascorbic acid. At a pH between 2 and 9 1,10-phenanthroline is added. the measurement of the absorbance of the orange-red complex formed is carried out at the wavelength of maximum absorption (510 nm). The method is applicable to test solutions from which an aliquot portion can be taken containing between 10 and 500 g of Fe…
Defines Canadian content and then gives explanations and examples
of the terms in the definition. 'Canadian content', frequently an
important aspect of the procurement process, is here defined so
that it can be considered from a common understanding.
Butadiene for industrial use — Determination of oxygen and argon in the gaseous phase above liquid b...
The analysis is carried out with a gas chromatograph fitted with a thermal conductivity detector. It can be operated at two temperatures, either at - 78 degrees centigrade or at ambient temperature. At ambient temperature, oxygen and argon are not separate and the method thus only allows the total content of these two gases to be determined. When the operations are carried out at - 78 degrees…
