Boric acid, boric oxide, disodium tetraborates and crude sodium borates for industrial use — Determi...
Specifies a method applicable to products in which the nickel content being determined exceeds 0,1 mg/kg. The principle of determination is based on dissolution of a test portion, formation of the coloured nickel furil -dioxime complex, extraction with chloroform and photometric measurement at a wavelength of about 435 nm.
Crude sodium borates for industrial use — Determination of alkali-soluble copper and manganese conte...
Describes a method applicable to products in which the alkalisoluble copper and manganese contents excess 0,25 and 0,5 mg/kg, respectively. The principle consists in successively determining the manganese and copper contents of the two coloured complexes obtained during the analysis, followed by photometric measurements at wavelengths of about 435 nm and 450 nm, respectively.
Crude sodium borates for industrial use — Determination of carbonate content — Gravimetric method
Covers a method based on reaction of the carbonate in a test portion with hydrochloric acid, absorption of the released carbon dioxide in soda asbestos and measurement of the increase in mass.
Sodium perborates for industrial use — Determination of degree of attrition
Specifies a method, the principle of which consists in breaking down a sample by a high velocity jet of air in a small fluidized bed, calculating the amount of breakdown (attrition) from the change in particle size distribution of the test portion before and after fluidization, and expressing the degree of attrition as the increase in the percentage of material which passes through a screen of…
Gymnastic equipment — Landing mats (2 000 mm x 1 250 mm x 60 mm)
Specifies dimensions, material, manufacture of landing surfaces, lateral faces, loops and handles, design and the related requirements and tests. The determination of these characteristics shall ensure, that for competitions and training mats are used, the hardness, shock absorption and resistance to slipping of the landing surface of which lie in a specific range, depending on their use, and…
Gymnastic equipment — Surfaces for floor exercices — Mats
Specifies dimensions, design and the necessary requirements and tests: hardness and shock absorption and resistance to slipping of the landing surface. Ensures that for competitions and training mats of the same hardness and shock absorption are used, the surface of which presents the same resistance to slipping, depending on their use, and that the risk of injury by slipping is reduced.
Chlorofluorinated hydrocarbons — Determination of boiling range — Test for product characterization
Covers a method permitting measurement of temperature differences of 0,5 °C. Should not be considered as an analytical method, but as a test for identification and indication of the purity of a product. Is based on evaporation by boiling of a known volume of the product under test and measurement of the temperatures corresponding to the evaporation of 5 and 95 % of the initial volume of the…
