Zobrazeno 1 - 10
of 83
pro vyhledávání: '"Ján Krupčík"'
Publikováno v:
Journal of chromatography. A. 1653
The rate constants for (L)-N-acetyl homocysteine thiolactone enantiomerization have been obtained from batch-wise studies and by dynamic gas chromatography of racemic mixtures. Results from the batch-wise experiments show that the kinetics of racemiz
Publikováno v:
Journal of Separation Science. 39:4765-4772
The enantiomeric composition of several chiral markers in lavender essential oil was studied by flow modulated comprehensive two-dimensional gas chromatography operated in the reverse flow mode and hyphenated to flame ionization and quadrupole mass s
Publikováno v:
Journal of Separation Science. 38:3397-3403
The analysis of Bulgarian and Turkish Rosa damascena Miller essential oils was performed by flow-modulated comprehensive two-dimensional gas chromatography using simultaneous detection of the second column effluent by flame ionization and quadrupole
Publikováno v:
Chirality. 26:279-285
The gas chromatographic separation of enantiomers of 2-Br carboxylic acid derivatives was studied on four different 6-TBDMS-2,3-di-O-alkyl- β- and -γ-CD stationary phases. The differences in thermodynamic data {ΔH and –ΔS} for the 15 structural
Publikováno v:
Journal of Chromatography A. 1330:51-60
Flow modulated comprehensive two-dimensional gas chromatography with simultaneous flame ionization detection (FM GC × GC-FID) and quadrupole mass spectrometric detection (FM GC × GC-qMSD) was applied to the analysis of a quantitative reference stan
Publikováno v:
Journal of separation science. 39(24)
The enantiomeric composition of several chiral markers in lavender essential oil was studied by flow modulated comprehensive two-dimensional gas chromatography operated in the reverse flow mode and hyphenated to flame ionization and quadrupole mass s
Autor:
Zachary S. Breitbach, Pavel Májek, Aaron A. Ruch, Ján Krupčík, Milan K. Dissanayake, LeGrande M. Slaughter, Daniel W. Armstrong, Peter Kroll
Publikováno v:
Journal of chromatography. B, Analytical technologies in the biomedical and life sciences. 1051
Dynamic high resolution liquid chromatography (DHPLC) was used to determine the kinetic and thermodynamic activation parameters of interconversion of three novel pentahelicene derivatives {3,5-bis(trifluoromethyl)benzo[i]pentahelicene, naphtho[1,2-i]
Publikováno v:
Journal of chromatography. A. 1466
The performances of forward flow fill and flush (FFF) and of reverse flow fill and flush (RFF) in flow modulated comprehensive two-dimensional gas chromatography (GC×GC) using the same volume of the sampling channel have been studied and compared. S
Publikováno v:
Journal of Chromatography A. 1218:3186-3189
Retentivity tuning in comprehensive two dimensional GC separations of aliphatics (linear and cyclic hydrocarbons) and aromatics in gasoline by changing the carrier gas flows in the column series at constant working temperature parameters of both colu
Publikováno v:
Journal of Chromatography A. 1217:1821-1829
The non-modulated transfer (NMT) of the total effluent of the separation of polychlorinated biphenyls (PCBs) on two columns coupled in series has been studied. A non-polar poly(5%-phenyl-95%-methyl)siloxane column (40 m x 100 microm x 0.1 microm) and