B. Bescós, J. M. Orea, A. Gonzláez Ureña, "Laser Desorption Dynamics of Carbendazim on a Glass Surface", Laser Chemistry, vol. 18, Article ID 013792, 19 pages, 2000. https://doi.org/10.1155/2000/13792
Laser Desorption Dynamics of Carbendazim on a Glass Surface
A study on the desorption of carbendazim (methyl-2-benzimidazolecarbamate, mass = 191 amu) from a glass surface (Pyrex) has been carried out using an experimental set-up based on laser desorption and laser post-ionization followed by time-of-flight mass spectrometry. After optimization of the experimental conditions a resolution of ca. 850 was achieved at the mass of the pesticide (191 amu). All measured time-of-flight mass spectra showed not only an excellent signal to noise ratio, but also the lack of significant molecular fragmentation, except for a mass of 71 amu which was attributed to the lateral chain of the carbendazim. Neutral time-of-flight yields were measured for several desorption energies. Analysis of the corresponding velocity distributions suggests a thermal mechanism dominating the laser-induced desorption. Finally the capability of the present technique for analytical applications is also discussed.
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