Patent ID: 7619215
Filing Date: 2009-11-17
Classification: H01J,Y10T

Abstract:
1. A sample microfocusing plate for matrix-assisted laser desorption ionization (MALDI) mass spectrometry, comprising: an electrically conductive stainless steel substrate having at least one hydrophilic smooth stainless steel surface; at least one sampling area marked on the hydrophilic smooth stainless steel surface of the electrically conductive stainless steel substrate; and a substantially mono-layered hydrophobic organosilane formed on the hydrophilic smooth stainless steel surface through covalent bonding and having an opening to expose the hydrophilic smooth stainless steel surface at a central portion of the sampling area, wherein the sampling area comprises a hydrophilic central portion formed by the exposed hydrophilic smooth stainless steel surface and a hydrophobic peripheral portion formed by the mono-layered hydrophobic organosilane around the opening.