The method is applicable to alloys having zirconium contents between 0,1 and 1,0 % (m/m). However the method is not applicable completely to alloys having lead and/or bismuth (see annex). Rare earths, thorium and silver do not interfere. Specifies principle and procedure of the method, the reagents, apparatus, sampling, expression of results and test report.
Sodium carbonate for industrial use — Determination of sodium hydrogen carbonate content — Titrimetr...
The method is applicable to sodium carbonate products having a sodium hydrogen carbonate contained in a test portion into sodium carbonate by addition of a known excess of sodium hydroxide, precipitation of all the carbonate by means of barium chloride an determination of the excess of sodium hydroxide by means of a standard volumetric hydrochloric acid solution.
Sodium carbonate for industrial use — Determination of sulphate content — Barium sulphate gravimetri...
The principle in dissolution of a test portion and separation of the insoluble matter. Precipitation of sulphate as barium sulphate in dilute hydrochloric acid medium. Separation of the precipitate obtained and ignition at 800 °C +- 25 °C and weighing. The method is applicable to products having a sodium sulphate content equal to or greater than 0,01 % (m/m). Replaces ISO Recommendation R 743-…
Sodium carbonate for industrial use — Determination of loss of mass and of non-volatile matter at 25...
Describes a method of analysis of anhydrous sodium carbonate and sodium carbonate decahydrate. The principle of analysis consists in heating of thin layers of a test portion to constant mass at 250 °C. The residue constitutes the non-volatile matter at 250 °C. The loss of mass represents water in its various forms plus half the carbon dioxide content of the hydrogen carbonate present. Replaces…
Sodium and potassium silicates for industrial use — Determination of silica content — Gravimetric me...
The procedure is based on evaporation to dryness of a test portion previously acidified with hydrochloric acid. Dissolution of the soluble salts, filtration and washing of the insoluble matter. Second evaporation of the filtrate and washings under the same conditions, further dissolution of the soluble salts, filtration and washing. Calcination and weighing of the two lots of insoluble matter…
Glycerines for industrial use — Samples and test methods — General
The procedures specified are applicable to the analysis of crude or distilled glycerols having a glycerol content greater than 75 % (m/m). The methods relate to determination of alkalinity or acidity, determination of sulphated ash, determination of water, determination of density at 20 °C, determination of ash, arsenic, and glycerol. - Replaces ISO Recommendation R 1614-1970.
Potassium chloride for industrial use — Determination of potassium content — Potassium tetraphenylbo...
The method is applicable to products having a minimum KCL content of about 95 % (m/m). The principle consists in dissolution of a test portion taken from the laboratory sample, previously ground and sifted. Addition of formaldehyde solution to transform any ammonium ions present into hexamethylenetetramine, and of ethylenedinitrilotetraacetic acid, disodium salt, to complex any extraneous cations…
Potassium chloride for industrial use — Determination of potassium content — Sodium tetraphenylborat...
The method is applicable to products having a minimum KCl content of about 95 % (m/m). The principle consists in dissolution of a test portion taken from the previously ground and sifted laboratory sample and elimination of many ammonium ions present. Precipitation of the potassium, in a slightly acid medium, by an excess of an standard volumetric sodium tetraphenylborate solution. Filtration and…
