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Koelhed, M., Schaden, S., Karlberg, B., & Lendl, B. (2005). On-line hyphenation of quantum cascade laser and capillary electrophoresis. Journal of Chromatography A, 1083, 199–204. http://hdl.handle.net/20.500.12708/172899
The authors report the first successful hyphenation of a Fabry Perot quantum cascade (QC) laser to a capillary electrophoresis system. This involved use of a dedicated IR-transparent flow cell, made of CaF2, constructed by SU-8 based lithog. and low temp. wafer bonding techniques. Adenosine, guanosine, xanthosine and adenosine-5'-monophosphate were sepd. in a borate-contg. sepn. electrolyte (10 mM...
The authors report the first successful hyphenation of a Fabry Perot quantum cascade (QC) laser to a capillary electrophoresis system. This involved use of a dedicated IR-transparent flow cell, made of CaF2, constructed by SU-8 based lithog. and low temp. wafer bonding techniques. Adenosine, guanosine, xanthosine and adenosine-5'-monophosphate were sepd. in a borate-contg. sepn. electrolyte (10 mM, pH 9.3). Functional group (carbohydrate) detection was accomplished by use of the 1080 cm-1 emission line of the available QC-laser. The assessable optical path length could be increased, from the normally available 10-15 mm in CE-FTIR analyses, to 60 mm using this powerful mid-IR laser and aq. solns.
