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논문 기본 정보

자료유형
학술저널
저자정보
Ilkhomjan Saydumarov (Tashkent State Transport University) Dilshadbek Usmanov (Uzbekistan Academy of Sciences)
저널정보
한국질량분석학회 Mass Spectrometry Letters Mass Spectrometry Letters Vol.15 No.1
발행연도
2024.3
수록면
54 - 61 (8page)

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초록· 키워드

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An improved voltage modulation method (VMM) was used to control the heat release and adsorption properties of the adsorbent. In this work, the voltage and flux modulation methods were considered under unified experimental conditions of dissociative surface ionization (SI) of polyatomic organic molecules, the criteria were found when under VMM conditions the current relaxation of SI carries information about the kinetic properties of thermal desorption of ionizable dissociation particles arriving on the surface of polyatomic molecules. Conditions were found under which the relaxation of the ionic current in the flux modulation method is determined by the kinetics of the heterogeneous dissociation reaction of the original polyatomic molecules. The values of the thermal desorption rate constant K+ and the activation energy E⁺ obtained with VMM for desorption of (CH₃)₂NCH⁺₂ ions with m/z 58 by adsorption of imipramine and amitriptyline molecules agree well with each other and with the results for the desorption of the same ions by adsorption of other molecules. This confirms one of the basic conditions for the equilibrium process SI – the a degree (β coefficient) of the same particles SI on the same emitter surface is the same and does not depend on the way these particles are formed on the emitter surface.

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Abstract
Introduction
Theoretical part
Experimental
Results and Discussion
Conclusions
References

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