Department of Physical and Analytical Chemistry, Faculty of Chemistry, University of Oviedo, 33006 Oviedo, Spain.
Anal Bioanal Chem. 2010 Apr;396(8):2863-9. doi: 10.1007/s00216-009-3367-7. Epub 2010 Feb 9.
The aim of this work is to optimise and evaluate radiofrequency glow discharge (RF GD) time-of-flight mass spectrometry (TOFMS) for identification of organic polymers. For this purpose, different polymers including poly[methylmethacrylate], poly[styrene], polyethylene terephthalate-co-isophthalate and poly[alpha-methylstyrene] have been deposited on silicon wafers and the RF GD-TOFMS capabilities for qualitative identification of these polymeric layers by molecular depth profiling have been investigated. Although some molecular information using the RF continuous mode is available, the pulsed mode offers a greater analytical potential to characterise such organic coatings. Some formed polyatomic ions have proved to be useful to identify the different polymer layers, confirming that layers having similar elemental composition but different polymer structure could be also differentiated and identified.
本工作旨在优化和评估射频辉光放电（RF GD）飞行时间质谱（TOFMS），以用于鉴定有机聚合物。为此，在硅晶片上沉积了不同的聚合物，包括聚[甲基丙烯酸甲酯]、聚[苯乙烯]、聚对苯二甲酸乙二醇酯-间苯二甲酸酯和聚[α-甲基苯乙烯]，并研究了 RF GD-TOFMS 通过分子深度剖析对这些聚合物层进行定性鉴定的能力。虽然使用 RF 连续模式可以获得一些分子信息，但脉冲模式提供了更大的分析潜力来表征这种有机涂层。一些形成的原子团离子已被证明可用于鉴定不同的聚合物层，证实了具有相似元素组成但不同聚合物结构的层也可以区分和鉴定。
