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…
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…
Propylene for industrial use — Determination of oligomers — Gas chromatographic method
A liquid sample obtained at low temperature is vaporized and then passed through a chromatographic column which permits the separation of the oligomers. The detection is performed by flame ionization an the peaks obtained are compared with those derived from an external standard. The method is applicable to propylene having propene dimers (hexenes) contents greater than 20mg/kg and propene…
Butadiene for industrial use — Determination of active tert-butyl-catechol (TBC) (4- (1,1- dimethyle...
The active TBC in a test portion is extracted by mixing with a solution containing m-nitrophpenol (as the internal standard) and evaporating the butadiene. The TBC and m-nitrophenol are separated by high-performance liquid chromatography and detected by UV: The peak areas or peak heights are measured and the TBC content is determined by using a calibration graph. The polymerization inhibitor TBC…
