Rechercher

Gives the requirements for industrial rigid laminated sheets for electrical purposes based on polyester resins and glass mat reinforcements. The contents of the corrigenda of September 1995 and December 1997 have been included in this copy.

Gives the requirements for industrial rigid laminated sheets for electrical purposes based on phenolic resins and different reinforcements (woven cotton cloth, woven glass cloth, cellulose paper and wood veneer). The contents of the corrigenda of September 1995 and December 1997 have been included in this copy.

Gives requirements for industrial rigid laminated sheets for electrical purposes based on epoxide resins and different reinforcements (cellulose paper, woven glass cloth, glass mat and woven polyester cloth). The contents of the corrigenda of September 1995 and December 1997 have been included in this copy.

Gives the requirements for industrial rigid laminated sheets for electrical purposes based on melamine resins and different reinforcements (woven glass cloth and woven cotten cloth). The contents of the corrigenda of September 1995 and December 1997 have been included in this copy.

Gives the requirements for industrial rigid laminated sheets for electrical purposes based on silicone resins and woven glass cloth. The contents of the corrigenda of September 1995 and December 1997 have been included in this copy.

The principle of the method specified is to decompose a test portion by alkaline fusion with sodium carbonate and subsequent acidification with hydrochloric acid in the presence of boric acid to complex fluoride, selective reduction to the blue molybdosilicic acid complex, spectrometric measurement of the absorbance of the coloured complex at a wavelength corresponding to the absorption maximum…

The method specified is based on alkaline fusion of a test portion with a mixture of sodium carbonate and boric acid, dissolution of the melt in excess hydrochloric acid, reduction of the iron(III) with hydroxylammonium chloride, formation of the iron(II)-1,10-phenanthroline complex in a buffered medium (pH between 3 and 5), spectrometric measurement of the absorbance of the coloured complex at a…

The method specified is based on decomposition of a test portion by fusion with sodium carbonate and subsequent acidification with hydrochloric acid in the presence of boric acid to complex fluoride, formation of the molybdosilicic acid complex and selective reduction to the blue molybdosilicic acid complex with addition of tartaric acid to prevent interference from phosphate, spectrometric…

The method specified is based on dissolution of a test portion by fusion with a mixture of sodium carbonate, boric acid and sodium nitrate and subsequent acidification with nitric acid, formation of the molybdophosphate complex and extraction with a mixture of ethyl acetate and butyl acetate, followed by selective reduction of the complex to molybdenum blue by means of tin(II) chloride added to…

Lays down the material specifications of solid vulcanized rubber sealing rings and specifies requirements for their effect on the organoleptic properties (colour, taste and odour) and the total organic carbon content of water. In the case of composite seals (which comprise, e.g. both rigid and flexible rubbers), applies only to the requirement for their effect on the total organic carbon content…