Sodium hydroxide for industrial use — Determination of mercury content — Dithizone photometric metho...
Covers a method applicable to liquid or solid products having mercury contents greater than 0,05 mg/kg. The principle of determination is based on oxidation of the mercury contained in a test portion to mercury(II) ions by potassium permanganate in the presence of sulphuric acid, reduction of the excess oxidant, extraction in chloroform of the complex formed, and photometric measurement of the…
Sodium hydroxide for industrial use — Determination of mercury content — Flameless atomic absorption...
Covers a method applicable to liquid or solid products having mercury contents greater than 0,02 mg/kg. The principle of determination is based on oxidation of the mercury contained in a test portion to mercury(II) ions by potassium permanganate in the presence of sulphuric acid, reduction of the excess oxidant by hydroxylammonium chloride, reduction of the mercury(II) ions to mercury by tin(II)…
Sodium sulphate for industrial use — Determination of calcium content — Flame atomic absorption spec...
Specifies a method, the principle of which is based on acidification of a test portion with hydrochlorid acid, aspiration of the test solution into an acetylene-dinitrogen monoxide or acetylene-air-flame, and measurement of the absorption of the 422,7 nm line emitted by a calcium hollow-cathode lamp.
Ferrochromium and ferrosilicochromium — Determination of chromium content — Potentiometric method
The method is applicable to all grades of these ferroalloys. Specifies principle, reagents, apparatus, sample, procedure, expression of results and test report.
Defines, in both English and French, terminology pertaining to
dental science, dental materials, dental equipment and the
practice of dentistry. Establishes translations of terms between
the two official languages. It is anticipated that additions to
the contents of the standard will be made annually.
Cryolite, natural and artificial, and aluminium fluoride for industrial use — Determination of phosp...
Specifies a method applicable to products having phosphorus contents equal to or greater than 0,002 % (m/m). The principle is based on alkaline fusion of a test portion with a mixture of sodium carbonate and boric acid, dissolution of the fused mass in nitric acid, neutralization of suitable aliquot portion with sodium hydroxide solution, reaction with acid ammonium molybdate solution to form a…
The Standard specifies the following characteristics of the oil. Appearance: Clear, slightly viscous liquid. Colour: Almost colourless to yellow. Odour: Characteristic, sweet, woody, persistent. Relative density at 20/20 °C: 0,968 - 0,983. Refractive index at 20 °C: 1,5030 - 1,5080. Optical rotation at 20 C: Range from - 21 to - 15 . Miscibility with 70 % (V/V) ethanol at 20 °C: 1 : 5. Ester…
