UV laser pyrolysis fast gas chromatography/time-of-flight mass spectrometry for rapid characterization of synthetic polymers: instrument development

被引:14
作者
Meruva, NK [1 ]
Metz, LA [1 ]
Goode, SR [1 ]
Morgan, SL [1 ]
机构
[1] Univ S Carolina, Dept Chem & Biochem, Columbia, SC 29208 USA
关键词
laser pyrolysis; fast gas chromatography; time-of-flight mass spectrometry; synthetic polymer characterization;
D O I
10.1016/S0165-2370(03)00092-5
中图分类号
O65 [分析化学];
学科分类号
070302 ; 081704 ;
摘要
We have designed and developed an instrument that combines a Q-switched Nd:YAG laser, frequency quadrupled to 266 nm, with fast gas chromatography/time-of-flight mass spectrometry (GC/TOF-MS) for rapid characterization of synthetic polymers. The combined instrument integrates the processes of sampling by the laser, reconcentration of the volatile products, and sample introduction to the GC/TOF-MS. This method uses a UV laser as a fragmentation source, which can create pyrolysis fragments without prior sample pretreatment, even with transparent organic materials. Gaseous pyrolysis products are then concentrated on a cryogenic trap cooled by liquid carbon dioxide and thermally desorbed into the head of the chromatographic column for separation and identification of the components by GC/TOF-MS. Interfacing laser pyrolysis to fast GC/TOF-MS reduces overall analysis time without compromising the chromatographic peak information. This paper describes the design. construction and applications of UV laser pyrolysis-GC/TOF-MS for characterization of synthetic polymer samples. Results from this technique have been compared to conventional heated filament analysis. (C) 2003 Elsevier B.V. All rights reserved.
引用
收藏
页码:313 / 325
页数:13
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