摘要
The ratio of the signal intensities obtained in multiphoton ionization spectrometry and fluorescence spectrometry is compared semi-quantitatively for several aromatic compounds. The ratios, normalized against N-ethylaniline, are 0.2-1 for aniline derivatives, however, the value for anthracene is 7 × 10-6 in a one-colour ionization scheme and 7 × 10-4 in a two-colour ionization scheme. The small value obtained for the] large' aromatic compound is ascribed to the high ionization potential relative to the two-photon energy for excitation and subsequent ionization; three photons are required in the one-colour scheme and an additional laser with sufficient energy must be aligned temporally and spatially for ionization in the two-colour scheme.
原文 | 英語 |
---|---|
頁(從 - 到) | 1037-1041 |
頁數 | 5 |
期刊 | The Analyst |
卷 | 116 |
發行號 | 10 |
DOIs | |
出版狀態 | 已發佈 - 1991 |
對外發佈 | 是 |
ASJC Scopus subject areas
- 分析化學
- 生物化學
- 環境化學
- 光譜
- 電化學