Separation of phenylenediamine isomers byligand exchange chromatography
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چکیده
منابع مشابه
Separation of porphyrin isomers by high-performance liquid chromatography.
A reversed-phase gradient elution system is described for the simultaneous separation of the type I and type III isomers of 8-, 7-, 6-, 5- and 4-carboxylated porphyrins and isocoproporphyrins. The method, adaptable for isocratic and stepwise separation of individual groups of isomers, is also suitable for preparative isolation of pure porphyrins. The analyses of porphyrin isomers in the urine a...
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Enriched stable isotopes of many elements have been widely used in many aspects and such isotopes have been primarily used as the tracer for agricultural and biochemical studies and the availability of the isotopically labeled compounds have been now extensively increasing. Chemical exchange separation of isotopes is based on the equilibrium fractionation of isotopes between two phases, ion exc...
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High-performance anion-exchange (HPAE) chromatography under alkaline conditions (pH congruent to 13) has been found to efficiently separate neutral oligosaccharides (triose to undecaose) according to molecular size, sugar composition, and linkage of monosaccharide units. The method was able to resolve 1----3, 1----4, and 1----6 positional isomers of neutral oligosaccharides, which are defined a...
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Methods for the separation of adrenaline, noradrenaline, hydroxytyramine, and dihydroxyphenylalanine (dopa) by employing starch columns (2, 3), paper chromatography (4-7), or countercurrent extraction (8) have limited usage either because of the length of time required for the fractionation or because of the small amounts of material that can be separated. A procedure is described below in whic...
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A ligand exchange HPLC method for enantioseparation of ofloxacin enantiomers was developed by a using C8 stationary phase. Chromatographic separation was performed on a Zorbax-300SB-C8 column eluted with the mobile phase consisting of 15 % methanol in water containing 10mM phenylalanin and 5 mM CuSO4 at flow rate of 0.8 mL/min. The method was simple, rapid and suitable for routine analytical st...
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ژورنال
عنوان ژورنال: BUNSEKI KAGAKU
سال: 1969
ISSN: 0525-1931
DOI: 10.2116/bunsekikagaku.18.19