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.
Fruit juice — Determination of soluble solids content — Pycnometric method
The method consists in measuring of the relative density of a test portion at 20 C using a pyknometer, and conversing, using a table, of the relative density sinto the soluble solids content expressed as sucrose. It is applicable to products containing no suspended matter and to clear concentrated products. For other fruit and vegetable products the method specified in ISO 2173 should be used.
Soaps — Determination of chloride content — Titrimetric method
The determination is carried out by argentometric titration after decomposition of a test and separation of fatty acids by filtration. The method is applicable to soaps having a chloride content, expressed as sodium chloride, equal to or greater than 0,1 % (m/m). It cannot be applied to componounded products.
Manganese ores and concentrates — Determination of calcium and magnesium contents — EDTA titrimetric...
The method is applicable to products having calcium and magnesium contents greater than 0,3 % (m/m). Should be read in conjunction with ISO 4297. Specifies principle, reagents, apparatus, sample, procedure and expression of results.
