0162199 - UIACH-O 200024 RIV DE eng J - Journal Article
Chmelík, Josef - Konečný, P. - Planeta, Josef - Zdráhal, Zbyněk - Vejrosta, Jiří - Chmelík jr., J.
Characterization of polydimethylsiloxanes using an off-line combination of supercritical fluid chromatography with matrix-assisted laser desorption ionization mass spectrometry.
HRC Journal of High Resolution Chromatography. Roč. 23, 7/8 (2000), s. 502-506. ISSN 0935-6304
R&D Projects: GA AV ČR IAA4031802; GA ČR GA203/97/P103
Subject RIV: CB - Analytical Chemistry, Separation
Impact factor: 2.062, year: 2000

Polydimethylsiloxanes in a commercial silicone oil sample were characterized by off-line combinations of supercritical fluid chromatography with two mass spectrometry techniques. SFC was used to separate polydimethylsiloxanes on micropacked capillary columns (lenght 150 mm, i.d. 320 .mu.m, packed by ODS 5 .mu.m particles). The fractions for the identification studies were obtained from an SFC run at defined time intervals, when the restrictor was pulled out from chromatographic flame ionization detector and inserted into a glass vial with acetone. For the identification of individual oligomers, GC-MS was used for low molecular ones and MALDI-TOF MS for higher ones, respectively. The range of determined molecular masses was from 474 to 5500 Da.
Permanent Link: http://hdl.handle.net/11104/0059518