Preparation of Standard Fine Particles for Study of Stability and %lectrophoretic mobilityy

为了<zeta>制备标准的微粒悬浮液和找出这些技术中存在的问题，对两种聚合物胶乳悬浮液（样品-A;苯乙烯/纳斯共聚物胶乳，样品-B;两性聚合物胶乳）进行了Zeta电位絮凝浓度（c.f.c）的同时测定。<zeta>在9个实验室中使用不同的电泳装置进行了Zeta电位测定，其中包括Rank Brother M-2，Pen Kem-501，一个Pen Kem-3000和一个马尔文Zetasizer-F似乎所有实验室的数据彼此相当一致，但升高的电势供应倾向于增加<zeta>样品-B的等电点附近的相对于pH曲线的斜率。用静态法同时测定了样品A上KNO_3、Mg（NO_3）_3、La（NO_3）_2和La（NO_3）_3的含量，并与动力学法和动态光散射（L.S.）法c.f.c.如下所示;静态方法&lt;L.S.技术&lt;动力学方法。此外，认识到在确定c.f.c.时，介质中的固体浓度起着有效的作用。

Simultaneous mesurements of zeta(<zeta>)-potentical flocculation concentration(c.f.c) on two polymer latex suspensions(Sample-A; Styrence/Nass copolymer latices, Sample-B; Amphoteric.polymer latices) were carried out to prepare a standard fine particle suspension and to find out the problem in these techniques.The <zeta>-potential measurements were carried out in nine laboratories using the different electrophoretic apparatus which involved a Rank Brother M-2, a Pen Kem-501, a Pen Kem-3000 and a Malvern Zetasizer-F. it appears that the data from all the laboratiories are in fairly agreement with each other, but an elevated potential supply tends to increase the slope of the <zeta> vs. pH curve near the isoelectric point of Sample-B.The c.f.c. of KNO_3, Mg(NO_3)_3 and La(NO_3)_2 and La(NO_3 )_3 on Sample-A, was determined simultaneously by a static method and the results ware compared with the value determined by the Kinetic method and the dynamic light scattering(L.S.) technique. The sequence of the value of c.f.c. is as follows; static method <L.S. technique <kinetic method. Furthermore, it is realized that in determinig the c.f.c., the solid concentration in the medium plays an effective role.