Rechercher

Specifies the safety requirements for the manufacture, application, operation and maintenance of powered industrial trucks.

Describes a method based on prior conversion of the sulphur compounds in a test portion to sulphate, if required, and reduction of the sulphate ions ti hydrogen sulphide by a mixture of hydriodic and phosphinic acids in the presence of hydrochloric acid. The hydrogen sulphide is entrained in a current of nitrogen and absorbed in a solution of sodium hydroxide in aqueous acetone, followed by…

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.

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.

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.

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…