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水溶液中Cr^3+的火焰原子吸收光谱法测试条件的优化
引用本文:谭颖,张莹,顾锡龙.水溶液中Cr^3+的火焰原子吸收光谱法测试条件的优化[J].光谱实验室,2009,26(5):1114-1119.
作者姓名:谭颖  张莹  顾锡龙
作者单位:青海省岩矿测试应用研究所,青海省西宁市盐湖巷15号,810008
摘    要:为优化火焰原子吸收光谱法测定水溶液中的Cr^3+的测试条件,分别采用单因素简单比较法、正交实验设计极差分析及正交实验回归方法考察了光谱通带n,空心阴极灯电流I,燃烧器高度h以及乙炔/空气流量比P对于仪器灵敏度的影响。结果表明单因素简单比较法获得的实验条件最优。乙炔/空气流量比P对火焰原子吸收仪器灵敏度影响最大、其次是光谱通带n,燃烧器高度h和灯电流I的影响很小。测定水溶液中的Cr^3+时仪器灵敏度最佳的实验条件为:乙炔/空气流量比P=0.4;光谱通带n=0.2nm;灯电流I=5mA;燃烧器高度h=5cm。

关 键 词:  单因素简单比较法  正交实验设计  正交回归分析  火焰原子吸收光谱法

Testing Condition Optimization of Using Flame Atomic Absorption Spectrometry to Detect Content of Cr~(3+) in Water
TAN Ying,ZHANG Ying,Gu Xi-Long.Testing Condition Optimization of Using Flame Atomic Absorption Spectrometry to Detect Content of Cr~(3+) in Water[J].Chinese Journal of Spectroscopy Laboratory,2009,26(5):1114-1119.
Authors:TAN Ying  ZHANG Ying  Gu Xi-Long
Institution:The Rock and Mineral Test Application Research Institute of Qinghai;Xining 810008;P.R.China
Abstract:In order to optimize test condition of detecting content of Cr^3+ in water by using flame atomic absorption spectrometry, single factor comparison method, orthogonal experiment design and regress analysis based on orthogonal experiments were used to investigate effect of width of slit (n), lamp current (I), burner height (h) and the proportion of ethyne to air (P) on the sensitivity of instrument. The experiment conditions obtained by single factor comparison are the best. Proportion of ethyne to air plays most important role on instrument sensitivity among the four factors, slit width takes the second place, lamp current and burner height plays the lest important role. The best sensitive condition of the apparatus to detect content of Cr^3+ in water is identified as follows: proportion of ethyne to air P= 0. 4 ;slit width n= 0. 2mm ;current strength I= 5mA ;burner height h=5cm.
Keywords:Chromium  Single Factor Comparison  Orthogonal Experiment Design  Orthogonal Regression Analysis  Flame Atomic Absorption Spectrometry  
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