Silica sol separation

Figure 4. SEC calibration curve for silica sol separation (hard sphere particles, single pore size column) (1), Column PSM-1500 (8.9 fim), 30 X 0.78 cm mobile phase O.IU Na.HPO -NaH.PO, pH 8.0...

This separation method HDC was developed within the Dow Chemical Company in the early 1970s [27]. This method has been utilized for determining the particle size of many polymer lattices [27,28], but it also can be used for characterizing a wide range of silica sols. Separation by the hydrodynamic effect is illustrated in Figure 40.12 [29]. Colloids flowing between particles in a packed bed or within a capillary are subjected to different velocities... 

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