Zobrazeno 1 - 10
of 25
pro vyhledávání: '"Eva Benická"'
Publikováno v:
Journal of Liquid Chromatography & Related Technologies. 28:1453-1471
The optimisation of the selectivity of two columns coupled in series has been investigated in HPLC. Two columns with different polarities (PEG and CN) were coupled in series via a T connector and the retention of analytes chromatographed on the colum
Publikováno v:
Journal of Chromatographic Science. 42:516-523
A novel on-flow gas chromatographic (GC) method is developed for the determination of the kinetic rate constants and interconversion energy barrier of thermally labile enantiomers. The validity of the developed method is approved by the study of inte
Publikováno v:
Journal of Separation Science. 25:45-52
The gas chromatographic separation of enantiomers of seven N-TFA-O-alkyl amino acid derivatives was studied on four different permethyl- and 2,6-di-O-methyl-3-O-pentyl-β- and -γ-CD stationary phases.It was shown that the separation of enantiomers N
Publikováno v:
Journal of Microcolumn Separations. 8:57-65
The retention behavior of N-trifluoroacetyl-O-alkyl esters of selected amino acids with various types of alkyls in ester group was studied by capillary gas chromatography with modified cyclodextrin stationary phases. A model set of six different este
Publikováno v:
Chirality. 10:540-547
Gas chromatographic study on chiral separation of PCBs was performed in a series of capillary columns coated with 0.1-μm film of modified cyclodextrin (CD) stationary phases. The preparation of columns included the investigation into the effect of t
Autor:
Ján Hrouzek, Pat Sandra, Ivan Skacˇáni, Eva Benická, Ivan Sˇpánik, Martin Grenˇa, Ján Krupcˇík
Publikováno v:
Journal of Chromatography A. 779:253-262
A computer-assisted procedure was elaborated for optimization of selectivity of two capillary columns coupled in series for direct gas chromatographic multicomponent separations of enantiomers. Two fused-silica capillary columns (column A coated with
Publikováno v:
Journal of High Resolution Chromatography. 19:95-98
A simple dual-column gas chromatographic system with a six-port switching valve has been used to separate the atropisomers of PCB congeners 84, 91, and 95 in technical PCB formulations and in extracts of soil and river sediment. A capillary column co
Autor:
P. Bielek, Štefan Baláž, Eva Benická, Ľ. Halušcarka, G. Lindišolá, Ján Krupčík, Katarína Dercová
Publikováno v:
International Journal of Environmental Analytical Chemistry. 58:327-336
The anaerobic degradation of PCB in loamy and clayey soils containing indigeneous microflora was studied. The anaerobic conditions were created by an argon atmosphere in the flasks containing soil flooded by a liquid medium with glucose. GC-ECD analy
Publikováno v:
Journal of Chromatography A. 665:175-184
Low-boiling secondary alcohols (2-butanol, 2-pentanol and 2- and 3-hexanol) and their methyl, pentyl, acetyl and trifluoroacetyl derivatives were separated by gas chromatography on a fused-sifica capillary column coated with a mixture of OV-1701 and
Publikováno v:
Journal of Chromatography A. 665:3-8
A novel threshold criterion based on the degree of peak overlap is proposed. It can be used for the evaluation of the degree of separation for simple or complex mixtures. The criterion considers quality of separation for relevant peaks only. Non-symm