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Displaying 76 - 86 of 86

Matrix Clusters and Polymer-Matrix Adducts in the MALDI Analysis of Polystyrene

January 1, 2000
Author(s)
R J. Goldschmidt, Charles M. Guttman
The formation of matrix cluster ions and of polymer-matrix adduct ions in the matrix-assisted laser desorption/ionization (MALDI) analysis of polystyrene was investigated using layered sample preparations. It has been shown by post-source decay (PSD)

Comparison of Classical and MALDI-TOF-MS Analysis of a Polystyrene Interlaboratory Sample

January 1, 1999
Author(s)
William R. Blair, B M. Fanconi, R J. Goldschmidt, Charles M. Guttman, William E. Wallace, S Wetzel, David L. VanderHart
Over the past several years, the use of MALDI-TOF-MS for analysis of synthetic polymers has increased significantly. As the number of polymer analyses by MALDI has increased, scrutiny of the MALDI results in comparison to classically derived values for Mw

Post-Source Decay of Polystyrene Ions in Matrix-Assisted LaserDesorption/Ionization

January 1, 1999
Author(s)
R J. Goldschmidt, S Wetzel, William R. Blair, Charles M. Guttman
Analyte ions produced in matrix-assisted laser desorption/ionization (MALDI) are of low energy compared to those produced in many other mass spectrometricionization methods, so that there is usually little or no prompt fragmentation ofinitially formed ions

Statistical Methods For Holistic Mass Spectral Analysis

Author(s)
John Lu, Charles M. Guttman
Analysis of molecular mass distribution data for characterizing the complex synthetic polymer structure has demanded new statistical methods. As with many other high throughput measurement devices, typically only very small number of replicates can be