ISO 3451-3-1984 Plastics Determination of ash Part 3 Unplasticized cellulose acetate《塑料 灰分的测定 第3部分 未增塑的乙酸纤维素》.pdf

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1、Norme internationale INTERNATIONAL ORGANIZATION FOR STANDARDIZATIONWlEMI(LLYHAPOHAFl OPTAHM3AlJMR IlO CTAHAPTbl3AL m. est la masse dactate de cellulose sec, en grammes, calcule partir de la masse relle de la prise dessai, et de son taux dhumidit dtermin conformment IISO 585. 6 Nombre de dtermination

2、s 8 Procs-verbal dessai Effectuer deux dterminations. Calculer la moyenne arithmti- que des rsultats. Si lun des rsultats diffre de plus de 10 % de la moyenne des deux rsultats, rpter le mode opratoire jusqu ce que deux rsultats successifs ne diffrent pas de plus de 10 % de leur moyenne. 7 Expressio

3、n des rsultats Le taux de cendres, exprim en grammes pour 100 g dactate de cellulose sec, est donn par la formule m x 100 m0 Le procs-verbal dessai doit mentionner les indications sui- vantes : a) la rfrence la prsente Norme internationale; b) lidentification complte de lchantillon, y compris le type, le numro de code du fabricant, la source, la marque, etc.; c) lindication de la temprature utilise pour la calci- nation; d) le traitement auquel a t soumis lchantillon avant lessai, sil y a eu traitement; e) les rsultats de chacune des deux dterminations ainsi que la moyenne.

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