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化学学报
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化学学报 ›› 1982, Vol. 40 ›› Issue (5): 438-445. 上一篇    下一篇

论文

Zeeman效应原子吸收分析中元素的吸收线分裂及其对灵敏度影响的研究Ⅱ.精细和超精细结构的作用

马怡载, 冯皙   

  1. 中国科学院环境化学研究所, 北京
  • 投稿日期:1980-09-11 发布日期:2013-06-03
  • 通讯作者: 马怡载

STUDIES ON THE BEHAVIOR OF SPLITTING OF ABSORPTION LINES IN ZEEMAN EFFECT ATOMIC ABSORPTION SPECTROSCOPY AND INFLUENCE OF THE SPLITTING ON SENSITIVITY Ⅱ. THE EFFECT OF FINE AND HYPERFINE STRUCTURE ON ZEEMAN EFFECT ATOMIC ABSORPTION SPECTROSCOPY

MA YI-ZEI, FENG XI   

  1. Institute of Environmental Chemistry, AcademAa Sinica, Beijing
  • Received:1980-09-11 Published:2013-06-03

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应用Voigt函数近似计算公式和光谱线叠加原理,本文描绘了Cu3247.54Å,Bi3067.70Å,Li6707.84和6707.99A双线,Au2427.95Å以及Ag3280.68Å在Zeeman效应原子吸收分析(简称ZAAS)和普通原子吸收分析(简称NAAS)中的吸收线和发射线轮廓.用作图面积积分的方法,估算了ZAAS对NAAS的相对吸光度.计算值与实验值比较相符.从谱线轮廓图和相对吸光度的估算得知:Δνhfs与Δνσ-+相当,则Kπ可能为Kσ-+所抵消,灵敏度下降,如Cu3247.54Å和Bi3067.70Å;精细结构双线间距Δνf与Δνσ-+相当,则Kπ也将为Kσ-+抵消,灵敏度下降,如Li双线;在一定的磁场强度下,某些谱线所具有的超精细结构间距,却可以使发射线轮廓内Kπ得到加强,由Zeeman分裂而导致的灵敏度损失将减少,如Au2427.95A;Lorentz位移和谱线全变宽的大小,都可能造成Zeeman分裂对灵敏度影响大小的变化.

The profiles of both absorption and emission lines in ZAAS, as well in NAAS, wexe given for Cu 324.8 nm, Bi 306 .7 nm, Li 670.8 nm and Au 242.8 nm. The relative absorbance At value of those lines were evaluated. It was found by the profiles and Ar value that the sensitivities of above lines given by ZAAS, except in the case of Au 242.8 nm, are 3 or 4 times worse as compared with that of NAAS, due to the a components shifted into the profile of emission lines in the presence of fine or hyperfine structure with wider separation.