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We show here that ‘double‐barrelled’ laser desorption/resonance‐enhanced multi‐photon ionization mass spectrometry has many advantages over traditional single‐step desorption/ionization techniques, particularly if combined with Reflectron‐Time‐of‐Flight mass analysers. We demonstrate the effectiveness of this technique for large labile biomolecules, namely native chlorophylls, porphyrins and a peptide, as examples of structural and mass analysis.
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Grotemeyer et al. (1986) studied this question.
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