Sodium hydroxide for industrial use — Determination of calcium and magnesium contents — Flame atomic...
Applicable to products having contents of more than 2.5 mg Ca/kg and 0.5 mg Mg/kg if an acetylene-air flame is used or 0.6 mg Ca/kg and 1.0 mg Mg/kg if an acetylen-dinitrogen monoxide flame is used. The principle consists in the acidification of a test portion with hydrochloric acid, aspiration of the solution into an acetylene-dinitrogen monoxide flame or acetylene-air flame. In the latter case…
The method is applicable to the determination of nickel contents up to 2.5 % (m/m). Covers principle, reagents, apparatus, sampling, procedure, expression of results, and test report.
Steel, non-alloy and low-alloy — Determination of depth of decarburization
Defines carburization and specifies three methods of measuring the depth of decarburization of non-alloy and low-alloy steels (micrographic method, method of measuring the micro-hardness and methods of determination of carbon content).
Washing powders — Determination of total phosphorus(V) oxide content — Quinoline phosphomolybdate gr...
The determination is carried out in the following way: Hydrolysis of polyphosphates by nitric acid. Precipitation of phosphates in the form of quinoline phosphomolybdate in acetone solution. Drying and weighing of the precipitate.
Copper alloys — Determination of iron content — 1,10- Phenanthroline spectrophotometric method
The method is applicable to the determination of iron contents up to 0.4 % (m/m) in any of the copper alloys listed in ISO publications. ISO 1812 specifies principle, reagents, apparatus, sampling, procedure, expression of results and test report.
Milk — Determination of fat content (Routine method)
Is applicable to liquid milk, whole or partially skimmed, raw or pasteurized. The method specified is based on the saparation of the fat of the milk in a butyrometer by centrifuging after the protein has been dissolved with sulphuric acid. The procedure for checking the capacity of the milk pipette is described in an annex.
Hardmetals — Determination of cobalt — Potentiometric method
The method is applicable to carbides and binder metal powder mixtures, free of lubricant, all grades of presintered or sintered hardmetals, having a cobalt content exceeding 1 % (m/m). Gives principle, interfering elements, reagents, apparatus, sampling, procedure, expression of results and test report.
Aluminium oxide primarily used for the production of aluminium — Determination of sodium content — F...
The method is applicable to sodium contents equal to or greater than 0.05 % (m/m). The principle of the procedure consists in the fusion, at a controlled temperature, of a test portion with a mixture oflithium carbonate and boron trioxide or a mixture of lithium carbonate and lithium tetraborate. Dissolution of the fused mass in hydrochloric acid. Aspiration of the solution into a flame and…
