The name is absent

Appendix В

upper and lower stationary level (- 4.03 and -4.04 μm cm∕V s) are almost the
same and very close to - 4 μm∙cm∕V∙s, which is the reported mobility of standard
mobility solution. This indicates the instrument and measurement are accurate.

Figure B.1 Mobility profile of standard mobility solution

Fig. B.2 shows the zeta potential profile of kaolinite sample in synthetic brine
(Conductivity 4040 mS∕cm). The profiles of kaolinite sample are not symmetric.
Zeta potential values at upper and lower stationary level are not equal. The
reason may be that the kaolinite suspension is not homogeneous in the cell due to
the sedimentation. Thereby in the measurements, the sample was measured at
lower level and upper level for three times respectively. Table B.1 shows zeta

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