کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5364713 1388319 2007 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Influence of the photoionization process on the fragmentation of laser desorbed polycyclic aromatic hydrocarbons
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی تئوریک و عملی
پیش نمایش صفحه اول مقاله
Influence of the photoionization process on the fragmentation of laser desorbed polycyclic aromatic hydrocarbons
چکیده انگلیسی

Characterization of polycyclic aromatic hydrocarbons (PAHs) samples has been performed by laser desorption combined with multi-photon ionization technique using two different geometries of the ionization laser beam. This comparative study evidences the strong influence of ionization laser fluence on PAH fragmentation. Through a ∼103 enlargement of the ionization probe volume and 104 reduction of laser fluence over previous studies, fragment free mass spectra are obtained with higher sensitivity and selectivity. The ability to measure fragment free PAH mass spectra is a very important step in the end goal of measuring complex unknown mixtures of PAH desorbed from solid surface such as soot samples.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Applied Surface Science - Volume 253, Issue 15, 30 May 2007, Pages 6435-6441
نویسندگان
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