ISSN:
1040-7685
Schlagwort(e):
supercritical fluid chromatography
;
mass spectrometry
;
poly(acrylic acid)
;
linear polycarboxylate
;
derivatization
;
Chemistry
;
Analytical Chemistry and Spectroscopy
Quelle:
Wiley InterScience Backfile Collection 1832-2000
Thema:
Chemie und Pharmazie
Notizen:
Low molecular weight poly(acrylic acid) (PAA) samples were derivatized to increase their solubilities in the supercritical mobile phase, CO2. tert-Butyldimethylsilyl ester derivatives provided better chromatographic performance and molecular weight range than did trimethylsilyl or methyl esters. Individual oligomers were resolved through approximately n = 28. Higher oligomers, up to approximately n = 45 (corresponding to an underivatized molecular weight of more than 3300), were eluted from the column but were not resolved. Ammonia chemical ionization and electron ionization supercritical fluid chromatography-mass spectrometry data revealed that the PAA terminal groups of the samples studied were sulfonate and hydrogen.
Zusätzliches Material:
8 Ill.
Materialart:
Digitale Medien
URL:
http://dx.doi.org/10.1002/mcs.1220020405
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