Liquefied anhydrous ammonia for industrial use — Determination of water content — Gas chromatographi...
The water present in a sample is tranformed into acetylene by reaction with calcium carbide. The acetylene formed is determined by gas chromatography using an external standard consisting of a standard gas mixture with an inert gas, containing a known amount of acetylene. The method is applicable to products having water contents between 5 mg/kg and 3000 mg/kg.
Ammonium bicarbonate (Ammonium hydrogen- carbonate) for industrial use (including foodstuffs) — Dete...
A test portion is dissolved in water and acidified with hydrochloric acid. The carbon dioxide is eliminated by heating the solution. The lead is complexed and extracted with a solution of diethylammonium diethyldithiocarbamate in xylene. The solution is aspirated into an acetylene-air flame. The absorption of the 217 nm line or, alternatively, of the 283.3 nm line emitted by a lead hollow-cathode…
Jump Suits and Coveralls, Girls' Sizes 7 to 16, Regular Range - Dimensions
Applies to the dimensions considered essential to provide fit of
jump suits and coveralls for wear by girls (Canada Standard Sizes
7 to 16, Regular Range).
Liquefied anhydrous ammonia for industrial use — Determination of oil content — Gravimetric and infr...
A test portion is evaporated at ambient temperature and the oil contained in the residue is extracted with carbon tetrachloride. The oil contained in the residue is determined either gravimetrically by evaporation of the organic solvent and weighing of the residue or by spectrometric measurement of the absorbance of the organic phase at a wavelength of approximately 3.42 m. The gravimetric method…
Ammonia solution for industrial use — Determination of ammonia content — Titrimetric method
A test portion is introduced into a solution of boric acid and the solution obtained is titrated with a standard volumetric solution of sulfuric acid in the presence of methyl red as indicator. The method is applicable to solutions containing not more than 35 % (m/m) of ammonia.
