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New cyclodextrin derivatives(CDs),heptakis(2,6-di-O-methyl-3-O-methoxymethyl)-β-CD(Ⅰ)and heptakis(2,3,6-tri-O-methoxymethyl)-β-CD(Ⅱ),were investigated for their chromatographic performance as stationary phases for capillary gas chromatography(CGC).Both of