Two-photon excited fluorescence detection at 420 nm for label-free detection of small aromatics and proteins in microchip electrophoresis.
Two photon excited (TPE) fluorescence detection was applied to native fluorescence detection of aromatics in microchip electrophoresis (MCE). This technique was evaluated as an alternative to common one photon excitation in the deep UV spectral range. TPE enables fluorescence detection of unlabeled aromatic compounds, even in non-deep UV-transparent microfluidic chips. In this study, we demonstrate the proof of concept of native TPE fluorescence detection of small aromatics in commercial microfluidic glass chips. Label-free TPE fluorescence detection of native proteins and small aromatics in MCE was achieved within the micromolar concentration range, utilising 420 nm excitation light.
Schulze
Philipp
P
Institute of Analytical Chemistry, University of Leipzig, Linnéstr. 3, 04103, Leipzig, Germany.
Schüttpelz
Mark
M
Sauer
Markus
M
Belder
Detlev
D
D046209:Electrophoresis, Microchip / Q000295:instrumentation* / Q000379:methods*; D015394:Molecular Structure; D017785:Photons; D011412:Propanolamines / Q000737:chemistry; D011506:Proteins / Q000032:analysis* / Q000737:chemistry; D012701:Serotonin / Q000737:chemistry; D012822:Silicon Dioxide; D013050:Spectrometry, Fluorescence / Q000295:instrumentation* / Q000379:methods*; D014364:Tryptophan / Q000737:chemistry
D011412:Propanolamines; D011506:Proteins; D012701:Serotonin; D012822:Silicon Dioxide; D014364:Tryptophan