GOLD IMPLANTATION/DEPOSITION OF BIOLOGICAL SAMPLES FOR LASER DESORPTION TWO AND THREE DIMENSIONAL DEPTH PROFILING OF BIOLOGICAL TISSUES
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app pub date -
Dec 4, 2009
filing date -
Jun 4, 2004
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Abstract
The present invention enhances the laser desorption of biological molecular ions from surfaces by creating a surface localized MALDI particle matrix by ion implantation of low energy ionized clusters (gold, aluminum, etc.) or chemically derivatized clusters into the near surface region of the sample. MALDI analysis of the intact biomolecules on the surface or within a narrow subsurface region defined by the implantation range of the ions can then be performed by laser desorption into a mass spectrometer or, in a preferred embodiment, into a combined ion mobility orthogonal time of flight mass spectrometer.
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