Abstract
A continuous flow micro total analysis system (μ-TAS) consisting of an on-chip microfluidic device connected to a matrix assisted laser desorption ionization [MALDI] time-of-flight [TOF] mass spectrometer (MS) as an analytical screening system is presented. Reaction microchannels and inlet/outlet reservoirs were fabricated by powderblasting on glass wafers that were then bonded to silicon substrates. The novel lab-on-a-chip was realized by integrating the microdevice with a MALDI-TOFMS standard sample plate used as carrier to get the microfluidic device in the MALDI instrument. A novel pressure-driven pumping mechanism using the vacuum of the instrument as a driving force induces flow in the reaction microchannel in a self-activating way. Organic syntheses as well as biochemical reactions are carried out entirely inside the MALDI-MS ionization vacuum chamber and analyzed on-line by MALDI-TOFMS in real time. The effectiveness of the μ-TAS system has been successfully demonstrated with several examples of (bio)chemical reactions.
Original language | English |
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Pages (from-to) | 3972-3976 |
Number of pages | 5 |
Journal | Analytical chemistry |
Volume | 74 |
Issue number | 16 |
DOIs | |
Publication status | Published - 2002 |
Keywords
- EWI-12748
- IR-62307
- METIS-208728