Abstract
A differentially pumped external secondary ion source for Fourier transform mass spectrometry is described. Installation does not interfere with other experiments such as laser desorption or photodissociation. Spectra of cesium iodide clusters (with ions up to m/z 8187), polyethylene glycol 1000, and histidine from both glycerol and dithiothreitol-dithioerythritol matrices are reported. The ion with m/z 156 from histidine was recorded with mass resolution of 160,000.
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More From: Journal of the American Society for Mass Spectrometry
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