Abstract
Electro-osmotic flows were measured in Pyrex glass capillary, fused-silica capillary and poly(fluoroethyl—propylene) tubings. The electro-osmotic flow exhibited a good linear relationship with electric current density. The factors which influence electro-osmosis and separations are discussed. Good separations of pyridinium salts, sulphonic acids and metal ions were demonstrated, eluting towards the negative or positive terminal at up to 16 kV in aqueous solution. Theoretical plate numbers for pyridinium salts were around 1.5 · 10 5–2 · 10 5.
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