Abstract
After much improvement of a new type of RP-18 sintered plate, mobile phase could be successfully used in planar electrochromatography (PEC) without addition of buffer salts. It is very convenient to use such a mobile phase, because in so doing we save much human energy and derive new operating skills. In addition, high potential could be used with lower Joule heating. Our preliminary work revealed that a suitable degree of bonding of C18 was from 0.03 to 0.06, and good end-capping was achieved by placing the bonded sintered plate in a solution of dimethyldichlorosilane in toluene (ratio 1:100 to 1:1000) at room temperature for 20 min. If the degree of bonding was too high, the sintered plate would not work in the mobile phase without addition of buffer salts or would give bad separation results. New skills, for example high-speed wetting of the thin-layer plate and multi-electrodevelopment, are also introduced, incidentally, in this paper.
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