On-line preconcentration methods for capillary electrophoresis
نویسندگان
چکیده
منابع مشابه
On-Line Radioisotope Detection for Capillary Electrophoresis
Two simple, on-llne radloactlvlty detectors for Capillary electrophoreds are descrtbed. The first caplllary electrophoresls/radioisotope detector system utlllres a commerclally available semlcMKhtctor devloe, which is positioned external to the Separation channel and whlch responds dlrectly to lmpkrshrs y or hlgh-energy @ radlatlon. The second caplllary electrophoreds/radtope detector uttllzes ...
متن کاملOn-line sample preconcentration using field-amplified stacking injection in microchip capillary electrophoresis.
Previous reports describing sample stacking on microchip capillary electrophoresis (microCE) have regarded the microchip channels as a closed system and treated the bulk flow as in traditional capillary electrophoresis. This work demonstrates that the flows arising from the intersection should be investigated as an open system. It is shown that the pressure-driven flows into or from the branch ...
متن کاملOn-line sample preconcentration by sweeping with dodecyltrimethylammonium bromide in capillary zone electrophoresis.
On-line sample preconcentration of oligonucleotides with a new sweeping carrier was developed by using dodecyltrimethylammonium bromide (DTAB) below the critical micelle concentration (CMC). The sweeping results with DTAB below and above the CMC were compared. The use of DTAB below the CMC benefits the preconcentration of the oligonucleotides, while the use of DTAB above the CMC is good for hyd...
متن کاملPreconcentration and frontal electroelution of amino acids for in-line solid-phase extraction-capillary electrophoresis.
A new frontal electroelution approach that can be used for the preconcentration of amino acids in in-line solid-phase extraction-capillary electrophoresis (SPE-CE) has been developed. A single capillary was employed featuring a short monolithic SPE column created inside the capillary via photo-initiated, free-radical polymerisation of 3-sulfopropyl methacrylate and butyl methacrylate monomers. ...
متن کاملPneumatic Microvalve for Electrokinetic Sample Preconcentration and Capillary Electrophoresis Injection
Here we show that a closed pneumatic microvalve on a PDMS chip can serve as a semipermeable membrane under an applied potential, enabling current to pass through while blocking the passage of charged analytes. Enrichment of both anionic and cationic species has been demonstrated, and concentration factors of ~70 have been achieved in just 8 s. Once analytes are concentrated, the valve is briefl...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Electrophoresis
سال: 2000
ISSN: 0173-0835,1522-2683
DOI: 10.1002/1522-2683(20000801)21:14<2768::aid-elps2768>3.0.co;2-p