A simple, practical and economical procedure has been developed to prepare novel C18 ether-bond reversed phase packing. A soft and long C18 alkyl chain was coupled onto silica（Sinopak-S, particle size d=5 μm, pore diameter Dp=11 nm; and surface area S=170 m2/g） with γ-glycidoxypropyltrimethoxysilane as coupling agent. Chromatographic evaluation indicate that its reversed phase behavior was similar to ordinary ODS.
A C\-\{18\} RP packing with low adsorption was prepared by use of gelation reaction. Benzene, phthlene, phenanthrene, aniline and pyridine were selected as test solutes to evaluate the column with a mobile phase of 65% ACN aqueous solution. The performance and the stability were showed well after 1 000 column volume of 65% ACN aqueous solution(containing 0 1% TFA) .The strong polar alkine molecular can be separated well.
