Method and system for high-throughput quantitation of small molecules using laser desorption and multiple-reaction-monitoring
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United States of America Patent
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Issued Date -
Jul 13, 2006
app pub date -
Mar 27, 2003
filing date -
Mar 28, 2002
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Abandoned
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Abstract
A mass spectrometry quantitation technique enables high-throughput quantitation of small molecules using a laser-desorption (e.g., MALDI) ion source coupled to a triplequadrupole mass analyzer. The ions generated from the ion source are collisionally damped/cooled, and then quantitatively analyzed using the triple-quadrupole analyzer operated in the multiple-reaction-monitoring (MRM) mode. Significantly improved measurement sensitivity is obtained by applying laser pulses to the ion source at a high pulse rate of about SOOHz or higher. This allows the data acquisition to be performed rapidly, and the speed of about one second for each sample point on the ion source target has been achieved.
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