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A multimodal silica support carrying both anionexchange and hydrophobic functions was prepared by bonding phenylpropanolamine to epoxysilane-modified silica. This support was characterized with regard to its physical and chromatographic properties and has a surface coverage of 150 μmol g −1 ....
The most important definitions, terms and symbols included in the new, unified Nomenclature for Chromatography issued by the International Union of Pure and Applied Chemistry (IUPAC) are outlined.
A high-performance liquid chromatographic method is discribed for the determination of 6-amino-2,2-dimethyl-1,3-dioxepan-5-ol using Spherisorb ODS II stationary phase and mobile phase 30:70 (v/v) methanol: aqueous 1-octane sulfonic acid. Detection was fluorimetric following postcolumn...
The modification of the hydrophobicity of 28 commercial pesticides with a water-soluble β-cyclodextrin polymer (SCDP) in the presence of aqueous NaCl has been studied by reversed-phase thin-layer chromatography. The pesticides formed inclusion complexes with SCDP and these complexes are less...
β- and γ-cyclodextrin (CD) separated by liquid chromatography have been indirectly detected by depression of the background absorbance at a visible wavelength by means of inclusion complexation with phenolphthalein. The background signal was generated by phenolphthalein in an alkaline medium....
Several investigations were performed to optimise the extraction of polar triazine herbicides using supercritical fluid extraction from two different solid matrices: C 18 -silica and soil samples. Supercritical CO 2 modified with methanol (10% (V∶V)) at 250 bars and 50°C was required to...
The measurement of flow constancy and pulsation amplitudes of HPLC pump based on the photoconversion of malachite green leucocyanide is described. The irradiation time and hence the degree of conversion of the leucocyanide is correlated to flow fluctuations of piston driven HPLC pumps. It is...
From literature data for 14 mixed aminocarboxylato cobalt(III) complexes, the effect of the sorbent on R M values, salting-out efficiency ( m ) and separation factors (α) of adjacent members of homologous series was investigated in salting-out, thin-layer chromatography on silica gel,...
A high performance capillary electrophoresis (HPCE) procedure for the enantioseparation of the methyl acetals 3 and 4 of the natural products DIBOA 1 and DIMBOA 2 , respectively, has been developed using borate buffers (pH 9–10 range), cyclodextrins as chiral additives and addition of up to 20%...
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