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A new stationary phase (bikis(2,6-di-O-pentyl-3-O-hex-6-enyl)-pentakis(2,6-di-O-pentyl-3-O-methyl)-β-CD-polysiloxane) was synthesized and successfully applied in GC for the separation of chiral and achiral isomers. It possesses high column efficiency and exhibits excellent separation ability for...
The potential of capillary electrophoresis for the indirect determination of anhydrides was demonstrated by the analysis of five closely-related anhydrides as their corresponding acids. Direct analysis of such substances is generally difficult because of their susceptibility to hydrolysis. In...
The separation of the enantiomeric forms of biotin (vitamin H) using preparative chiral HPLC is described.
A reversed-phase high-performance liquid chromatographic (HPLC) assay, based on the indirect approach to enantiomeric analysis, for the determination of ibuprofen in human serum and urine has been developed. Following the addition of ( R,S )-flurbiprofen, as internal standard, the enantiomers of...
A simplex method for determining the constants S and k o from the equation ln k’ =ln k o − S ϕ (was developed and applied to the reversed phase separation of high molar mass polystyrenes using gradients of any curvature. Experimental retention times described using the equation had a...
An ion chromatographic method has been developed for the separation of Te (IV) and Se(IV) in hydrochloric acid mobile phases; the method has been used to determine tellurium in a high-purity non-stoichiometric semiconducting ZnCdTe-based material. Different cation-exchange columns (IonPac CS2,...
A novel approach to solid phase extraction, based on the use of a highly selective molecularly imprinted polymer, is presented. The versatility of this type of sorbent for solid phase extraction was demonstrated in a model batch-wise pre-concentration of sameridine prior to gas chromatography....
The biochemical functions of uridine-diphosphate-amino-sugar conjugates are largely unknown. As a first step to investigate their biological roles in glycolysis of higher organisms, bovine heart muscle, which metabolizes large quantities of glycogen, was assayed for...
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