Sodium and potassium silicates for industrial use — Determination of carbonates content — Gas-volume...
Three cases, defined by a preliminary test, are envisaged: silicates containing neither sulphides nor chlorates; silicates containing sulphides; silicates containing chlorates. The method based on boiling of an acidified test portion containing methyl orange and with a lead paper strip in the vapour. The presence of sulphides produces blackening of the paper and the presence of chlorates…
Sampling of chemical products for industrial use — Safety in sampling
Gives general recommendations applicable to all operations whatever the nature of the material being sampled is. Relates to safe access to and from the place where the sample is taken from and a safe working place with adequate safety regulations. Contains specific recommendations for hazardous products. The physical and chemical properties may be such that they can have a direct physiological…
Anhydrous hydrogen fluoride for industrial use — Determination of hexafluorosilicic acid content — R...
Applicable to products having H2 SiF6 contents between 0.01 % (m/m) and 0.2 % (m/m). Gives introductory instructions to the risk in handling with the product. The principle of analysis consists in formation of oxidized molybdosilicate (yellow) in weakly acid medium in the presence of boric acid to suppress interference by fluorine. Selective reduction of this complex after addition of sulphuric…
Anhydrous hydrogen fluoride for industrial use — Determination of sulphur dioxide content — Iodometr...
Applicable to products having SO2 contents between 0.002 % (m/m) and 0.20 % (m/m). The principle consists in addition of a measured volume of iodine solution to a test portion. Back-titration of the excess iodine using a standard volumetric sodium thiosulphate solution and calculation of the SO2 content from the amount of iodine used.
Industrial and Commercial Gas-Fired Package Furnaces
1. Scope
1.1 These requirements apply to natural and liquefied petroleum gas-fired packaged furnaces designed and manufactured primarily for the purpose of building heating.
1.2 These requirements apply to a package furnace having a manufacturer's maximum input rating within the range of over 400,000 BTUH and up to and including 10,000,000 BTUH. Package furnaces series extending beyond 10,…
Potassium hydroxide for industrial use — Determination of calcium content — EDTA (disodium salt) co...
The method is applicable to products having a calcium content equal to or greater than 0.002 % (m/m). The principle consists in titration of the calcium with a standard volumetric solution of the disodium salt of (ethylenedinitrilo)tetraacetic acid (EDTA disodium salt) in the presence of 2,2'-(ethylenedinitrilo)diphenol Äglyoxal-bis-(2-hydroxyanil)Ü as indicator, after elimination of…
Sodium hydroxide for industrial use — Determination of calcium content — EDTA (disodium salt) compl...
The method is applicable to products having a calcium content equal to or greater than 0.002 % (m/m). The principle consists in titration of the calcium with a standard volumetric solution of the disodium salt of (ethylenedinitrilo)tetraacetic acid (EDTA disodium salt) in the presence of 2,2'-(ethylenedinitrilo)diphenol Äglyoxal-bis-(2-hydroxyanil)Ü as indicator, after elimination of…