Surface active agents — Evaluation of certain effects of laundering — Methods of analysis and test f...
Methods for the determination of the following characteristics of the test pieces after washing are specified: intrinsic greying, intrinsic yellowing, increase in organic deposit content, increase in incineration residue, overall decrease in breaking strength, decrease in breaking strength resulting from chemical degradation of cellulose due to laundering and from mechanical factors in laundering…
Specifies methods for taking samples of chromium ores to be used at the places of dispatch and acceptance of ores for determining the chemical composition and moisture content of a consignment. The methods are applicable to both the manual and mechanical sampling of natural or processed ores. Details of the hammer and shovel method are given in annex A.
Specifies methods of preparing samples of chromium ores for determining the chemical composition and moisture content of a consignment. The methods are applicable to natural or processed ores.
Iron ores — Determination of acid-soluble iron(II) content — Titrimetric method
Is applicable to natural and processed iron ores containing from 1 % to 25 % acid-soluble iron(II) and only traces of metallic iron. Is limited for use in conjunction with the reducibility test methods. Is not applicable to ores containing more than 0,3 % (m/m) sulfur (as sulfide) and/or 5 % free carbon. Specifies principle, reagents, apparatus, sampling and samples, procedure, expression of…
Relates to special requirements applicable to cartridge fuse-links for miniature fuses with dimensions of 5 mm x 20 mm and 6.3 mm x 32 mm for the protection of electric appliances, electronic equipment and component parts thereof, normally intended for use indoors. The contents of the corrigendum of March 1990 have been included in this copy.
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…
