The first applications of a novel polyanionic derivative of (S-cycIodextrin (/3-CD), sulfobutyl ether ß-CO (ß-CO-SBE(IV)), as a stereoisomer selector in capillary electrophoresis are described. Separations were developed for one and two chiral molecules, including (±)-ephedrine, (±)pseudoephedrine, and several structurally related compounds.The separations achieved were found to be superior to those possible with neutral selectors such as ß-CO or heptakis(2,6dimethyl)-/8-CD. Base line separation of the four stereoisomers of (±)-ephedrine and (±)-pseudoephedrine was achieved in a single run with /S-CD-SBE(IV). Aspects regarding structural specificity, binding magnitude, and the utility of having a stereoisomer selector with a large countercurrent mobility are discussed.
SYNOPSISA simple 13C-NMR method for the quantitative determination of polyflavonoid tannin characteristics was developed. The system is effective for use on concentrated
I NTRO D UCTlO NPolyflavonoid tannins have been used for adhesives for more than two decades,' but systems to quantitatively determine their characteristics in simple and rapid manner have not developed at the same pace. Among the more interesting of such materials' characteristics that are useful for their adhesives application are: average degree of polymerisation (m,) of the natural tannin, which is often determined in regard to their viscosity in the concentrated solutions in which they are used for adhesives'.'; relative proportion of phloroglucinol vs. resorcinol type A-rings, which determines their reactivity toward formaldehyde and hence their rate and extent of cross-linking; and relative proportion of pyrogallol vs. catechol B-rings, which influences heterocycle pyran ring opening determining which type or rear-
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