加长炬管中Ca,Sr,Ba,Eu,Yb的强短脉冲供电空心阴极灯激发电感耦合等离子体离子/原子荧光光谱

本文报告了加长炬管中Ca,Sr,Ba,Eu,Yb等元素的强短脉冲供电空心阴极灯（HCMP－HCL）激发电感耦合等离子体（ICP）离子／原子荧光光谱。在大多数实验条件下，离子荧光比原子荧光强得多。Ba离子荧光检出限改善了2个数量级以上，Sr改善了1．5个数量级，Eu和Yb改善了近1个数量级。详细考察了HC－MP－HCL电源参数和ICP条件对离子／原子荧光强度影响。

High Current Microsecond Pulsed Hollow Cathode Lamp Excited Inductively Coupled Plasma Ionic Fluorescence Spectrometry of Eu, Yb, Ca, Sr and Ba with an Extended-sleeve Torch

Inductively coupled plasma (ICP) is a powerful atomizer for atomic fluorescence spectrometry (AFS),but high degree of ionization in high temperature of plasma at lower observation height and easy combination with oxygen at high observation height significantly decrease fluorescence intensity of refractory elements.Inoic fluorescence spectrometry (IFS) of Eu,Yb,Ca,Sr and Ba was investigated with high current microsecond pulsed (HCMP) hollow cathode lamps (HCLs) and an extended-sleeve torch adopted in commercial Baird Plasma AFS 2000 fluorescence spectrometer.Without introduction of any organic gas or solvent into the plasma,the detection limits (DLs) with HCMP-HCL-IFS was improved by about 1 5 order of magnitude (37x) for Sr,by over 2 orders of magnitude for Ba,and by nearly 1 order of magnitude for Eu and Yb as compared to those of conventionally pulsed (ICP-HCL-AFS).The HCMP IFS DLs of Eu and Yb were even superior to those of dye laser excited IFS reported in literatures.