Hardmetals — Chemical analysis by flame atomic absorption spectrometry — Part 5: Determination of co...
General requirements concerning the field of application, principle, interfering elements, apparatus, sampling and test report are given in ISO 7627-1.Determination of element contents in high concentration by the atomic absorption spectrophotometry method yields a wider scattering of results than are obtainable by other methods.
Caseins and caseinates — Determination of scorched particles content
Specifies a method on the principle of dissolution of a test portion in hot sodium carbonate, sodium polyphosphate or disodium ethylenediaminetetraacetate solution, or in sodium hydroxide solution at room temperature or at 60 degrees centigrade, filtration of the solution through a filtering disk and visual comparison of dried disk with scorched particle standard disks. The testing of filtering…
Adhesives with solvents for assembly of PVC-U pipe elements — Characterization — Part 1: Basic test ...
Specification of three basic test methods, which are essential in deciding the uniformity of an adhesive: Viscosity (dynamic and Brookfield viscosity), conventional dry matter content and ash content.
Manganese ores and concentrates — Determination of aluminium, copper, lead and zinc contents — Flame...
The method is applicable to a concentration range of 0,1 to 4,0 % (m/m) of aluminium, 0,005 to 1,0 % (m/m) of copper, 0,005 to 1,0 % (m/m) of lead and 0,005 to 0,25 (m/m) of zinc. ISO 5889 should be read in conjunction with ISO 4297. Specifies principle, reagents, apparatus, sampling, procedure and expression of results.
Starches and derived products — Determination of sulfur dioxide content — Acidimetric method and nep...
Entrainment in a current of nitrogen of the gas extracted from the acidified and heated product, and fixing and oxidation of the gas by bubbling through a dilute solution of neutral hydrogen peroxid. Titration of the sulphuric acid formed with standard volumetric sodium hydroxide solution of nephelometric determination in the case of low contents.
Starch hydrolysis products — Determination of water content — Modified Karl Fischer method
Reaction of a solution of iodine, sulphur dioxide, pyridine and 2-methoxyethanol with the water contained in the product dispersed previously in a mixture of methanol and formamide. The method described in ISO 760 is improved by determing the content directly using the special solvent.
