Specifies the minimum quality requirements and the corresponding methods of test for six grades of raw natural rubber. A table delivers the maximum dirt content and some other characteristics for these grades.
Steel and iron — Determination of total carbon content — Infrared absorption method after combustion...
The method is applicable to carbon contents between 0,003% (m/m) and 4,5 % (m/m). Specifies principle, reagents, apparatus, sampling, procedure, expression of results and test report. The annexes give additional information on the international co-operative tests, a graphical representation of precision data and features of induction furnaces and carbon analysers.
Surface active agents — Technical alkane sulfonates — Determination of the mean relative molecular m...
A test portion is dissolved in ethanol and the solution is acidified. The alkane monosulfonic acids are separated from the alkane disulfonates and sulfate ions by extraction with light petroleum. The light petroleum phase is evaporated and the residue is solved in ethanol. Traces of alkali are removed by means of a cation-exchange column. The eluate is neutralized with carbonate-free sodium…
Information Processing - Text and Office Systems - Standard Generalized Markup Language (SGML), and...
This National Standard of Canada is equivalent to International Standards ISO 8879-1986 and ISO 9069-1988.
1 Scope
This International Standard:
(a) Specifies an abstract syntax known as the Standard Generalized Markup Language (SGML). The language expresses the description of a document's structure and other attributes, as well as other information that makes the markup…
Electrical relays - Part 3: Single input energizing quantity measuring relays with dependent or inde...
Definitions. Standard values relating to energizing quantities influencing quantities. Fundamental characteristics relating to temperature rises and behaviour in service. Accuracy requirements relating to the characteristic quantity and specified times. Mechanical and electrical requirements. Markings and data. Methods of measurement.
The contents of the corrigendum of September 1992 have been…
Applies to panels intended for covering internal walls which may be grouped into five classes according to their constitution (siehe ISO 633). Specifies the following characteristics: dimensions, squareness and straightness of edges, moisture content, handling behaviour, resistance to boiling water and resistance of glued joint which shall in the classes IV and V not show any unglueing when…
Steel and iron — Determination of vanadium content — Flame atomic absorption spectrometric method
The method is applicable to vandadium contents between 0,005 % (m/m) and 1,0 % (m/m), provided that the tungsten content in the test portion is not higher than 10 mg and/or the titanium content is not higher than 5 mg. Specifies principle, reagents, apparatus, sampling, procedure, expression of results and test report. The annexes give additional information on the international co-operative…
Surface active agents — Soaps — Determination of low contents of free glycerol by molecular absorpti...
The determination is carried out in the following way: Decomposition of the soap by sulfuric acid and extraction of the fatty acida with light petroleum. Oxidation of the free glycerol remaining in the aqueous phase by periodic acid to formic acid and formaldehyde. On reaction with chromotropic acid, the aldehyde formed gives an absorbing compound whose absorbance is propotional to the free…
Surface active agents and soaps — Determination of water content — Azeotropic distillation method
The water in a test portion is removed by azeotropic destillation with boiling xylene or petroleum. The volume of the water collected is measured. The method is applicable to products in the form of powders having water contents greater than 5 % (m/m), and in the form of pastes ans solutions. It is not applicable to samples containing water-soluble volatile compounds, for example ethanol.