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Publication Citation: Significant Parameters in the Optimization of MALDI-TOF-MS

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Author(s): S Wetzel; Kathleen M. Flynn; James J. Filliben;
Title: Significant Parameters in the Optimization of MALDI-TOF-MS
Published: February 01, 2004
Abstract: One of the most significant issues in any analytical technique is optimization. Optimization and calibration are key factors in quantitation. In matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOF-MS), one of the limitations restricting quantitation is instrument optimization. Understanding which parameters are most influential and the effects of these parameters on the mass spectrum is required for optimization. This understanding is especially important when characterizing synthetic polymers by MALDI-TOF-MS, due to the complex nature of synthetic polymers. Several instrument parameters were studied using an orthogonal experimental design to understand effects on the signal-to-noise of a polystyrene distribution. The parameters examined included; laser energy, detector voltage, is/2 voltage, lens voltage and delay time. Other factors considered were polymer concentration and matrix. Detector voltage and delay time were the most influential of the instrument parameters for polystyrene.
Proceedings: Sigma Xi Postdoctoral Poster Presentations, 2004
Dates: February 19-20, 2004
Keywords: MALDI-TOF-MS,optimization,parameters,significant
Research Areas: Characterization, Polymers