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 are no other basic or acidic additives in the resin.If the resin contains additives which can be oxidized by perchloric acid,only the hydrochloric acid method (Clause 5) is applicable.
EN ISO 8988-2006由欧洲标准化委员会 IX-CEN 发布于 2006-09-01。
EN ISO 8988-2006在国际标准分类中归属于: 83.080.10 热固性塑料。
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