摘要
在液芯光纤内产生共振拉曼效应,可以提高拉曼光谱强度10~9倍。样品(被测物)的浓度、模吸收系数、光散射系数和模耦合系数决定光纤最佳长度。该技术为分子光谱研究提供了一种新实验方法,在痕量分析、液体中少量分子相互作用研究等方面有很大的应用潜力。低浓度的β—胡萝卜素(β-carotene)在CS_2中和I_2在CS_2中的拉曼光谱被得到,其浓度分别是1×10^(-13)mol/L和1×10^(-14)mol/L。
The resonance Raman effect is produced in liquidcore optical fiber, and the Raman spectra intensity can be enhanced 10~9 times. This technique provides a new experimental method for the study on molecular spectra arid trace analysis.A relationship between the optimum length of optical fiber and the sample concentration, absorption coefficient, scattering coefficient, and coupling coefficient was given. The Raman spectra of β-carotene in CS2 and I2 in CS2 samples were obtained, and the concentrations were 1× 10^(-13) mol/L and 1 ×10^(-14) mol/L, respectively.
出处
《分析化学》
SCIE
EI
CAS
CSCD
北大核心
1999年第5期570-573,共4页
Chinese Journal of Analytical Chemistry
基金
国家自然科学基金资助课题
