The effect of counter ions in matrix-assisted laser desorption/ionization of poly(methyl methacrylate)
UNSPECIFIED. (1998) The effect of counter ions in matrix-assisted laser desorption/ionization of poly(methyl methacrylate). EUROPEAN MASS SPECTROMETRY, 4 (6). pp. 435-440. ISSN 1356-1049Full text not available from this repository.
The role of the counter anion in positive-ion matrix-assisted laser desorption/ionization (MALDI) mass spectrometry of poly(methyl methacrylate) (PMMA) has been investigated. When PMMA was analyzed by MALDI in the presence of different alkali metal halides, A(+)X(-), ion yields decreased on changing X- from I- to Br- to Cl-. The effects of changing the alkali metal cation A(+) were greater when X- was chloride than when X- was iodide, With a mixture of two different alkali metal cations, PMMA showed different affinities for the cations, dependent upon which counter anion was present.
|Item Type:||Journal Article|
|Subjects:||Q Science > QC Physics|
|Journal or Publication Title:||EUROPEAN MASS SPECTROMETRY|
|Number of Pages:||6|
|Page Range:||pp. 435-440|
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