ISO 10136-6-1993 Glass and glassware analysis of extract solutions part 6 determination of boron(III) oxide by molecular absorption spectrometry《玻璃和玻璃器皿 萃取溶液的分析.pdf

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1、NORME INTERNATIONALE ISO 10136-6 Premire dition 1993-07-01 Verre et verrerie - Analyse des solutions dattaque - Partie 6: Dosage de loxyde de bore(M) par spectromtrie dabsorption molculaire Glass and glassware - Analysis of extract solutions - Part 6: Determination of boron(IIl) oxide by molecular a

2、bsorption spectrome 0-y Numro de rfrence ISO 10136-6:1993(F) ISO 10136=6:1993(F) Avant-propos LISO (Organisation internationale de normalisation) est une fdration mondiale dorganismes nationaux de normalisation (comits membres de IISO). Llaboration des Normes internationales est en gnral confie aux

3、comites techniques de IISO. Chaque comite membre inter-es papier dit moyen, de porosit gnralement uti- lise pour la filtration de Ioxalate de calcium; papier dit ferm ou ralement utilise pour Il baryum. (fin), de porosit gn- a filtration du sulfate de 6.14 Capsule en platine. 7 chantillonnage et : c

4、hantillons Prendre comme chantillon pour analyse la solution dattaque obtenue au cours dun essai de rsistance hydrolytique quelconque. 8 Mode opratoire 8.1 Prparation de la solution de dosage de la solution dessai blanc 8.1.1 Solution de dosage Transfrer, avec une pipette a un trait (6.8), une parti

5、e aliquote de 25 ml de la solution dattaque dans un bcher (6.4), et acidifier jusqu pH 3 environ avec de lacide chlorhydrique (5.14) sous contrle du pH-mtre (6.11). Porter a bullition, puis filtrer la solution tra- vers le papier filtre (6.13) appropri dans un autre bcher (6.4). Laver le filtre avec

6、 de petites quantits deau chaude. Faire vaporer dans la capsule en pla- tine (6.14) en faisant bouillir doucement, jusqu ob- tention dun volume de 20 ml environ, laisser refroidir et ajuster le pH a environ 5 avec la solution dhy- droxyde de sodium (5.13). Transvaser dans une fiole jauge a un trait de 25 ml (6.61, et complter au trait repre en rinant le bcher avec de petites quantits deau. 3

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