Plastics. Phenolic resins. Determination of hexamethylene-tetramine content. Kjeldahl method, perchloric acid method and hydrochloric acid method Ingestion-build-98192 BS EN 50443 discusses effects

BS EN 50443 discusses effects of electromagnetic interference on pipelines caused by high voltage a

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PD 970:2005 specifies the technical purchase and supply requirements for wrought semi-finished products manufactured from a range of carbon

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This standard is set to become a benchmark standard and a pre-requisite for tendering purposes

Plastics. Phenolic resins. Determination of hexamethylene-tetramine content. Kjeldahl method, perchloric acid method and hydrochloric acid method Ingestion-build-98192 BS EN 50443 discusses effects1 Scope This International Standard specifies three methods for the determination of the hexamethylenetetramine (hexa) content of phenolic resins. The three methods are equivalent. The Kjeldahl method described in Clause 3 is not applicable if there are other components containing nitrogen in the phenolic resin. The perchloric acid method and the hydrochloric acid method described in Clause 4 and Clause 5, respectively, are only applicable if there