溶液中三价稀土Ho3+、Nd3+的脉冲激光光声光谱研究及其测定

采用自制的液体光声传感器,研究了在620～665nm波长范围不同溶剂中稀土Ho³⁺的光谱精细结构;探讨了入射激光脉冲能量、测试温度以及各种与水混溶的有机溶剂对光声信号强度的影响。在乙腈水溶液中测定稀土Ho³⁺、Nd³⁺检测限分别为5×10^-8mol/L和1.0×10^-7mol/L,相应的吸光度为1.5×10^-7和6.3×10^-7。

Photoacoustic Spectrometry Investigation, and Determination of Rare Earth Ions Ho~3+ arid Nd~3+ in Liquid

The applications of the pulsed laser photoacoustic spectroscopy. to the rare earth spectra and trace analysis are presented. Ahome-made high sensitive photoacoustic transducer was used to. detect the photoacoustic signal in liquid. The high resolution photoacoustic spectra of Ho³⁺ ion in different, solvents, were mea-sured and compared with its absorption spectrum. It also discusses how the phqto-acoustic sensitivity is affected by laser pulse energy, temperature of measurement and the organic solvents which can be mixed with water. The trivalent rare earth ions Ho³⁺ and Nd³⁺ in aqueous acetonitrile solution had been determined. The detection limit is 5×10^-8mol/Lfor Ho³⁺,1.0×10^-7mol/Lfor Nd³⁺, and corresponds to the absor.bance of 1.5×10^-7 and 6.3×10^-7, respectively.