Ethylene for industrial use — Sampling in the liquid and the gaseous phase
Describes the procedure and the precautions to be taken in drawing representative samples of ethylene in the liquid phase stored at -100 °C and in the gaseous phase, for the purpose of their analysis excluding the determination of water content, other polar components and hydrocarbons heavier than C5. In an annex a diagrammatic representation is given of a system for the removal of the portion of…
Cinematography — Recorded characteristic for magnetic sound records on 35 mm motion-picture film exc...
This International Standard specifies the recorded characteristic for magnetic Sound records on 35 mm motion-picture film excluding striped release prints when used at the nominal Speed of 24 frames (45,6 cm or 18 in) per second or 25 frames (47,5 cm or 18.7 in) per second.
NOTE - This International Standard and relevant portions of Recommendation No. 265-2 of the CCIR have substantially the same…
Fruit and vegetable products — Determination of 5-hydroxymethylfurfural (5-HMF) content
The method comsists in preparing of a test solution by adding water to test portion, in the case of products containing more than 10 mg of free sulphur dioxide per litre, adding of acetaldhyde, then adding of p-toluidine and barbituric acid solution to an aliquot potion of the test solution, thus forming a red coloration by reaction with 5-hydroxymethylfurfural present, and spectrometric…
Textile glass — Rovings — Basis for a specification
Is intended to serve as a guide for the establishment of technical specifications for products of given type. Rovings are divided in two main groups: - rovings that are chopped during subsequent operations - rovings that are utilized without being chopped The following particulars are mentioned and the relevant International Standards are quoted: Designation, type of glass, filament diameter,…
Butadiene for industrial use — Determination of oligomers — Gas chromatographic method
A liquid or a vaporized gaseous test portion is injected into a gas chromatography column. After passage of the test portion through this column the oligomers are separated. The detection is performed by flame ionization. The peaks obtained are compared with those derived from an external standard. The oligomers which may be present are: 4-vinyl cyclohexene, 1,3-cyclooctadiene, 1,5-cyclooctadiene…
Iron ores — Determination of sulfur content — Combustion method
The method ist applicable to a concentration range of 0,002 to 0,25 % (m/m) of sulfur in natural iron ores, and iron ore concentrates and agglomerates including sinter products. The results are not affected by the presence of fluoride. Specifies principle, reagents, apparatus, sampling and samples, procedure, expression of results, and test report. ISO 4690 includes three annexes.
Soils - Moisture-Density Relations Modified Proctor Test
The present standard describes the method to determine the relation between the
moisture content and the density of soils and soil aggregates when these are
compacted in standard moulds using 4,54 kg rammers dropped a height of 457 mm.
Four methods are described herein.
NOTE 1 - The laboratory compaction tests described in this standard generally
provide good measures of optimum moisture…
