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Open-tubular capillary electrochromatography with bare gold nanoparticles-based stationary phase applied to separation of trypsin digested proteins
Mikšík, Ivan ; Lacinová, Kateřina ; Zmatlíková, Zdeňka ; Sedláková, Pavla ; Král, V. ; Sýkora, D. ; Řezanka, P. ; Kašička, Václav
Open-tubular capillary electrochromatography (OT-CEC) using bare gold nanoparticles-based stationary phase has been applied to separation of tryptic peptide fragments of native and glycated proteins, bovine serum albumin and human transferrin. OT-CEC with bare gold nanoparticles stationary phase was found to be a suitable technique for separation of complex peptide mixtures originating from enzymatic (tryptic) digestion of native and glycated bovine serum albumin and human transferrin, and for glycation studies of these proteins.
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Chiral analysis of beta-alanyl-D,L-tyrosine and its derivatives by capillary electrophoresis with 2-hydroxypropyl-beta-cyclodextrin stereoselector
Sázelová, Petra ; Šolínová, Veronika ; Schimperková, Tereza ; Mášová, Alice ; Jiráček, Jiří ; Kašička, Václav
A new capillary electrophoretic method was developed for separation of enantiomers of antimicrobial dipeptide betha-Ala-D,L-Tyr and its derivatives using 50 mM Tris-phosphate, pH 2.50, as background electrolyte and 2-hydroxypropyl-betha-cyclodextrin at concentrations 20 – 60 mg/mL as chiral selector. In addition, association constants of complexes of the enatiomers of dipeptide betha-Ala-D,L-Tyr and its derivatives with 2-hydroxypropyl-betha-cyclodextrin chiral selector were determined.
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Capillary electrophoretic chiral analysis and estimation of helix inversion barrier of helquats using randomly sulfated cyclodextrins as chiral selectors
Kašička, Václav ; Koval, Dušan ; Sázelová, Petra ; Severa, Lukáš ; Adriaenssens, Louis ; Vávra, Jan ; Teplý, Filip
Capillary electrophoresis in acidic sodium phosphate background electrolyte, pH 2.4, with randomly sulfated alpha-, beta- and gamma-cyclodextrins as chiral selectors was employed for fast, high-resolution separation of enantiomers of a series of 24 helquats, a new class of N-heteroaromatic dicationic helicene-like species. The developed CE methodology will be utilized in the further investigation of helquats, e.g., in evaluation of their preparative enantioresolution procedures, in monitoring of their racemization and determination of interconversion barrier of helquat enantiomers.
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Application of capillary electrophoresis in forensic science: Analysis of fireworks
Eliáš, Milan ; Maier, V. ; Knob, R.
In all samples of fireworks, K+, Na+, Ca2+ and Mg2+ ions were proved and quantified by the method of capillary zone electrophoresis using water solution of 10 mM 4-aminopyridine, titrated with hydroxyisobutyric acid to the pH 4.3, as background electrolyte and indirect UV-absorption detection at 200 nm. Pb2+ or Ba2+ ions were proved in few samples. The other selected inorganic cations were not proved in any sample of selected fireworks. NH4+ ions were not detected in any pre-blast samples, but they were established in some post-blast (glazed tiles) samples.
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