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자연과학
공학
의약학
농수해양학
예술체육학
복합학
지원사업
학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
커뮤니티
연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 발행연도
- 2025.3
- 수록면
- 13 - 21 (9page)
이용수
초록· 키워드
In this work, we have studied the synthetic insecticides imidacloprid and chlordimeform on both oxidized and metallic tungsten thermoemitters in electric fields of E<10<sup>5</sup> V/cm using surface (thermal) ionization mass spectrometry. Imidacloprid (1-(6-chloro-3-pyridylmethyl)-N-nitroimidazol-2-ylideneamine) is a neurotoxic insecticide of the neonicotinoid family and is one of the most widely used in agriculture. Chlordimeform is a carboxamidine, classified as both a formamidine insecticide and acaricide, as well as a member of monochlorobenzenes. The experiments were conducted using the MI 1201 B magnetic static mass spectrometer, which was specifically modified for the surface ionization method. The studied samples were efficiently ionized on the oxidized thermoemitter, and the mass spectra consisted of M<sup>+</sup> , [M-H]<sup>+</sup> , [M-H-2nH]<sup>+ </sup>and [M-R]<sup>+</sup> ions. On the metallic thermoemitter, the mass spectra consisted of fewer lines compared to those obtained on the oxidized surface, indicating that no additional ions were generated. The mechanisms of ion formation on both oxide and metallic surfaces were discussed. For the first time, the ionization energies of the major ions of the studied compounds were evaluated using the surface ionization method, as well as the heat of sublimation of the molecules. Unimolecular decays were detected in the mass spectrum of chlordimeform. The surface ionization mass spectrometry data of samples was compared with the gas chromatography-mass spectrometry data.
#Surface ionization mass spectrometry
#metallic and oxidized thermoemitter
#imidacloprid and chlordimeform
#adsorption
#ion formation
#gas chromatography-mass spectrometry
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목차
- Abstract
- Introduction
- Experimental
- Results and Discussion
- Conclusions
- References
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UCI(KEPA) : I410-151-25-02-092813010