Compressors, pneumatic tools and machines — Preferred pressures
Lays down a series of preferred pressures to be used as reference pressure when presenting performance data for pneumatic equipment. Components for compressed air systems should also be designet to meet the standardized pressures. The stated pressure are effective (gauge) pressures, given in bars.
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.
