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National Repository of Grey Literature 3 records found  Search took 0.00 seconds. 
Using of capillary isotachophoresis and on-line capillary zone electrophoresis for the determination of microcomponents in samples with complex matrices
 Herrmannová, Michaela ; Křivánková, Ludmila ; Vytřas, K.
Beginning of capillary isotachophoresis is in seventieth years last century. Theory of the isotachophoretic separation process has been elaborated during twentieth years, the instrumentations were developed and considerable number of applications were publicated in articles. ITP-CZE enables in the first step to inject a relatively large sample volume, to separate sample components and to remove undesirable components. In the second step a simplified and defined part of the sample is analysed. Real samples of sweeteners, human serum and urine were analysed.
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Determination of ethylglucuronide, the main metabolite of ethanol, in human serum by ITP-CZE
 Herrmannová, M. ; Křivánková, Ludmila
It is possible to detect alcohol in human body only in a relatively short time after ethanol consumption. Ethylglucuronide as an alcohol metabolite, can be determined in body fluids, tissues and hair even after several days. ITP-CZE enables in the first step to inject a relatively large sample volume, to separate sample components and to remove undesirable components. In the second step a simplified and defined part of the sample is analysed
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Capillary zone electrophoresis of samples with high conductivity matrix. Optimization of borate separation medium
 Křivánková, Ludmila ; Gebauer, Petr ; Březková, M.
Capillary zone electrophoresis proved to be a very useful method for analyses of many kinds of samples. The most often used background electrolyte system is borate buffer containing usually sodium, ammonium or Tris. Using of borate buffer we have proven, that not only coion but also counterion can be used for optimization of the separation. Experiments and calculations explaining behavior of analytes in sodium and ammonium system were verified by computer simulation using programme Simul 4.0.
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