PULSE-BURST ASSISTED ELECTROSPRAY IONIZATION MASS SPECTROMETER
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United States of America Patent
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Issued Date -
Jul 2, 2015
app pub date -
Dec 27, 2013
filing date -
Dec 27, 2013
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Abstract
The present invention relates to a mass spectrometer system, which combines laser desorption with pulse bursts comprising a train of ultrashort pulses and electrospray ionization. The pulse separation between individual pulses within the pulse burst is selected such that transient phenomena on an irradiated sample do not fully relax between individual pulses. Pulses with pulse widths ranging from fs to sub ns are conveniently implemented. The pulse widths can be selected to allow for multi-photon excitation of a sample while at the same time minimizing heat accumulation in a sample. Low cost laser systems such as fiber lasers can be configured to generate appropriate pulse bursts. The technique is suitable for mass spectrometry imaging with high spatial resolution. The laser system can serve as an electronic clock to which the whole mass spectrometry system or mass spectrometry imaging system is synchronized.
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