- 作者: Ching-Bin Ke and King-Chuen Lin*
- 作者服務機構: Department of Chemistry, National Taiwan University, Taipei 106, and Institute of Atomic and Molecular Sciences, Academia Sinica, P. O. Box 23-166, Taipei 106, Taiwan, R.O.C.
- 中文摘要: As interfered with by alkali and alkaline earth metal halides added as the matrix in an acetylene/air flame, the fluorescence quantum yield of In as the analyte in a laser-induced fluorescence (LIF) flame spectrometry has been thoroughly characterized. The fluorescence quantum yield is determined by a ratio of F to A, where F is the measured fluorescence of In and A is the difference between the absorption signals recorded for the analyte and the blank solutions. The normalized fluorescence signal is treated to prevent deviations due to variations of the atomization efficiency under the conditions with and without the matrix added. The fluorescence quantum yield is measured to be almost independent of the matrix concentration up to 500 ppm (mg/mL) studied, under conditions of either optical unsaturation or saturation. By considering a quenching effect induced by electron-atom collisions, the calculated fluorescence quantum yields are consistent with our observations.
- 英文摘要: --
- 中文關鍵字: Matrix effect; Fluorescence quantum yield; Laser-induced fluorescence.
- 英文關鍵字: Matrix effect; Fluorescence quantum yield; Laser-induced fluorescence.