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National Repository of Grey Literature 2 records found  Search took 0.01 seconds. 
Preconcentration of ion compounds from sample by epitachophoresis
 Kocianová, Vanda ; Dvořák, Miloš (referee) ; Voráčová,, Ivona (advisor)
Epitachophoresis is newly developed method, which allows to separate and concentrate analytes from large volumes of complex samples. Principle is based on isotachophoresis and utilize discontinuous electrolyte system. Different design of device is used, its round shaped and due to that acceleration of analytes zone migration occurs during separation towards centre of device and at the same time widening of zones happens. Focusation, concentration and separation of analytes between leading and terminating electrolyte progress from outer line of device towards its centre. It is necessary to stabilize this boundary to prevent mixing of leading and terminating electrolyte. Main target of this diploma thesis is optimization of epitachophoretic conditions, mainly electrolyte boundary stabilization options. Tested stabilizing media were agarose gels, foamed polymer disks and PDMS columns. All leading and terminating electrolyte boundary stabilizing media undergo several optimizations so the best option can be selected for concreate applications. DNA was used as a model analyte and the media with the highest recovery were selected. The best results offered NEEO and PFEG agarose gels and Dyneema foamed polymer with recovery over 70%. Another interesting alternative are PDMS columns, with their open structure that allow concentration of large volume analytes such as microorganisms.
Detailed record
Preconcentration of ion compounds from sample by epitachophoresis
 Kocianová, Vanda ; Dvořák, Miloš (referee) ; Voráčová,, Ivona (advisor)
Epitachophoresis is newly developed method, which allows to separate and concentrate analytes from large volumes of complex samples. Principle is based on isotachophoresis and utilize discontinuous electrolyte system. Different design of device is used, its round shaped and due to that acceleration of analytes zone migration occurs during separation towards centre of device and at the same time widening of zones happens. Focusation, concentration and separation of analytes between leading and terminating electrolyte progress from outer line of device towards its centre. It is necessary to stabilize this boundary to prevent mixing of leading and terminating electrolyte. Main target of this diploma thesis is optimization of epitachophoretic conditions, mainly electrolyte boundary stabilization options. Tested stabilizing media were agarose gels, foamed polymer disks and PDMS columns. All leading and terminating electrolyte boundary stabilizing media undergo several optimizations so the best option can be selected for concreate applications. DNA was used as a model analyte and the media with the highest recovery were selected. The best results offered NEEO and PFEG agarose gels and Dyneema foamed polymer with recovery over 70%. Another interesting alternative are PDMS columns, with their open structure that allow concentration of large volume analytes such as microorganisms.
Detailed record

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