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Effect of pressure on electrophoretic mobility of polystyrene latex particles
Author(s) -
Sakakibara Akira,
Kitagawa Shinya,
Tsuda Takao
Publication year - 2004
Publication title -
electrophoresis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.666
H-Index - 158
eISSN - 1522-2683
pISSN - 0173-0835
DOI - 10.1002/elps.200305915
Subject(s) - electrophoresis , shrinkage , particle (ecology) , materials science , polystyrene , helium gas , capillary electrophoresis , chemistry , composite material , chemical engineering , chromatography , analytical chemistry (journal) , helium , polymer , organic chemistry , oceanography , engineering , geology
A capillary electrophoresis system that can apply arbitrary helium gas pressures at both inlet and outlet reservoirs was constructed. The system was used to investigate the effect of pressure on electrophoretic behavior of polystyrene latex particles. The electrophoretic mobility of latex particles was increased with the application of pressure (< 3.0 kgf/cm 2 ). The shrinkage of particle diameter under pressurization was observed using a microscope, however, the magnitude of shrinkage was not enough to explain the increase in electrophoretic mobility. Therefore, the application of pressure might increase the electric charge of the latex particle. Since methanol inhibited the enhancement in the electrophoretic mobility of the latex particles, water might play an important role in increasing mobility.