高等学校化学学报

高等学校化学学报 ›› 1999, Vol. 20 ›› Issue (S1): 76.

• Atomic Spectrometry • 上一篇    下一篇

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-An Update

ZHANG Shao-Yu1, HUANG Ben-Li1, GONG Zhen-Bin1, YANG Peng-Yuan2   

  1. 1. Department of Chemistry and the Key Laboratory of Analytical Sciences of MOE, Xiamen University, Xiamen 361005, P. R. China;
    2. Department of Chemistry, Fudan University, Shanghai 200433, P. R. China
  • 出版日期:1999-12-31 发布日期:1999-12-31
  • 通讯作者: HUANG Ben-Li
  • 基金资助:

    The donation of the Plasma AFS 2000 spectrometer by Baird Corp., MA, USA, is gratefully acknowledged. This work was supported by the National Natural Science Foundation of China.

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-An Update

ZHANG Shao-Yu1, HUANG Ben-Li1, GONG Zhen-Bin1, YANG Peng-Yuan2   

  1. 1. Department of Chemistry and the Key Laboratory of Analytical Sciences of MOE, Xiamen University, Xiamen 361005, P. R. China;
    2. Department of Chemistry, Fudan University, Shanghai 200433, P. R. China
  • Online:1999-12-31 Published:1999-12-31
  • Contact: HUANG Ben-Li
  • Supported by:

    The donation of the Plasma AFS 2000 spectrometer by Baird Corp., MA, USA, is gratefully acknowledged. This work was supported by the National Natural Science Foundation of China.

PDF (PC)

摘要：

Although pulsed dye laser as an excitation source for atomic fluorescence spectrometry (AFS) has been widely investigated, pulsed hollow cathode lamp (HCL) has been used in commercial instruments for this purpose for decades. Inductively coupled plasma (ICP) is a powerful atomizer for AFS, but the high temperature of the ICP causes high degree of ionization for most elements,hence HCL-ICP-AFS is usually excised at observation zones much higher than those for emission work, using a torch with an extended outer tube ("extended-sleeve") to stabilize the tail flame. Although an organic gas or solvent is usually introduced into the ICP to reduce the oxidizing effect of the entrained air in the tail flame, it is still difficult to determine refractory elements such as rare earth elements (REEs). Huang et al.reported that HCLs operated with high current microsecond pulses (HCMP) emitted intense atomic and ionic lines. Winefordner's group3 has reported high current pulsed HCL excited AFS and ionic fluorescence spectrometry (IFS),they found that the AFS detection limits (DLs) were improved for all the studied elements, but their IFS DLs were not improved except for Sr.

Abstract:

Although pulsed dye laser as an excitation source for atomic fluorescence spectrometry (AFS) has been widely investigated, pulsed hollow cathode lamp (HCL) has been used in commercial instruments for this purpose for decades. Inductively coupled plasma (ICP) is a powerful atomizer for AFS, but the high temperature of the ICP causes high degree of ionization for most elements,hence HCL-ICP-AFS is usually excised at observation zones much higher than those for emission work, using a torch with an extended outer tube ("extended-sleeve") to stabilize the tail flame. Although an organic gas or solvent is usually introduced into the ICP to reduce the oxidizing effect of the entrained air in the tail flame, it is still difficult to determine refractory elements such as rare earth elements (REEs). Huang et al.reported that HCLs operated with high current microsecond pulses (HCMP) emitted intense atomic and ionic lines. Winefordner's group3 has reported high current pulsed HCL excited AFS and ionic fluorescence spectrometry (IFS),they found that the AFS detection limits (DLs) were improved for all the studied elements, but their IFS DLs were not improved except for Sr.

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