ISO 506-1992 Rubber latex natural concentrate determination of volatile fatty acid number《浓缩天然胶乳 挥发脂肪酸值的测定》.pdf

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1、NORME INTERNATIONALE Troiskme edition 1992-06-01 Latex concentri! de caoutchouc nature1 - Dbtermination de Iindice dacide gras volatil Rubber latex, natural, concentrate - Determination of volatile fatty acid number Numbro de rkfbrence IS 0 506: 1992(F) IS0 506:1992(F) Avant-propos LISO (Organisatio

2、n internationale de normalisation) est une federation mondiale dorganismes nationaux de normalisation (comit6s membres de IISO). Lelaboration des Normes internationales est en g est la teneur en caoutchouc set, expri- rnee en pourcentage en masse, du latex concentrb; est la teneur en mat IS0 506:199

3、2(F) P est la masse volumique, en megagrammes par metre cube, du se- ru ml); 134,64 est un facteur decoulant de la masse moleculaire relative de Ihydroxyde de potassium, de son equivalence en hy- droxyde de baryum et des parties du se- rum acidifiees et distillees. Recommencer Iessai si les resultat

4、s des deux de- terminations different de plus de - 0,Ol unit - 10 % de Iindice VFA reel, lorsque cet indice est supitrieur a 0,lO unit b) identification de Iechantillon pour essai; c) resu sont Itats, expri ainsi que la forme sous laquelle ils m d) compte rendu de tous details particuliers even- tue

5、ls releves au tours de Iessai; e) compte rendu de toutes op&ations non pr&ues dans la presente Norme internationale ou dans les Normes internationales auxquelles il est fait reference, ou de toutes operations facultatives. 1) P- 142 Mg/m3 pour les latex concentres centrifuges ou ecremes. IS0 506:199

6、2(F) Dimensions en millim6tres Jc Dint en verre rod6 de vapeur r Sortie deau YEntree Symbole A B C D E F G H I J K Diam&e extb 29 A 13 a 9 23 10 56 25 a 44 a 15 ii 20 a rieur 32 14 27 48 gz3o 17 22 llAl2 9 a 10 kpaisseur de lzi la 0,75 a 0,75 isI 1 iI la2 0,75 ii 1,5a 123 0,75 ii 0,75 a paroi 1,5 1,

7、5 1,25 1,25 13 1,25 2 195 1,25 1,25 6 Figure 1 - Appareil de distillation & la vapeur (alambic de Markham) 4 Page blanche IS0 506:1992(F) CDU 678.031.5S43.852.1 Descripteurs: caoutchouc, caoutchouc naturel, latex, concentk, analyse chimique, dosage, acide gras, mkthode volumktrique. Prix bas6 sur 4 pages

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