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流动注射荧光分析法用于土壤及水系沉积物中铈(Ⅲ)含量的测定

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黄承志, 迟锡增, 朱铿, 马春琪. 流动注射荧光分析法用于土壤及水系沉积物中铈(Ⅲ)含量的测定[J]. 环境化学, 1994, 13(1): 65-70.
引用本文: 黄承志, 迟锡增, 朱铿, 马春琪. 流动注射荧光分析法用于土壤及水系沉积物中铈(Ⅲ)含量的测定[J]. 环境化学, 1994, 13(1): 65-70.
shu
Huang Chengzhi, Chi Xizeng, Zhu Keng, Ma Chunqi. A STUDY ON DETERMINATION OF CERIUM(Ⅲ)IN SOIL AND STREAM SEDIMENT BY FLOW INJECTION FLUORESCENCE ANALYSIS[J]. Environmental Chemistry, 1994, 13(1): 65-70.
Citation: Huang Chengzhi, Chi Xizeng, Zhu Keng, Ma Chunqi. A STUDY ON DETERMINATION OF CERIUM(Ⅲ)IN SOIL AND STREAM SEDIMENT BY FLOW INJECTION FLUORESCENCE ANALYSIS[J]. Environmental Chemistry, 1994, 13(1): 65-70.
shu

流动注射荧光分析法用于土壤及水系沉积物中铈(Ⅲ)含量的测定

  • 1.

    西南师范大学环境化学研究所, 重庆630715;

  • 2.

    北京师范大学化学系, 北京100815

  • 中图分类号: X53

A STUDY ON DETERMINATION OF CERIUM(Ⅲ)IN SOIL AND STREAM SEDIMENT BY FLOW INJECTION FLUORESCENCE ANALYSIS

  • 1.

    Institute of Environmental Chemistry, Southwest Normal University, Chongqing, 630715;

  • 2.

    Department of Chemistry, Beijing Normal University, Beijing, 100875

  • 摘要: 研究表明Ce3+在pH6.2KCI介质中以254.0nm紫外光激发时,在352.0nm外发出具有恒定强度的荧光.因而可选择pH 5—6作为测定酸度条件,利用Al2(SO4)3消除Fe3+等离子的干扰,建立起Ce3+的流动注射荧光分析法.方法的线性范围是2.0×10-7-2.0×10-6mol/l,一元回归方程△F=663600C-0.041(n=103 v=0.9997),检测限6.0×10-9mol/l,测定频率120—150次/h.该法成功地用于标准土壤和水系沉积物分析,其回收率和变异系数分别为93.6—108.1%和96.0—106.4%(n=10);0.064%和4.65%.
    Abstract: Our study showd that Ce3+ has a constant fluorescence intensity emitted at 352.0 nm when excited at 254.0 nm in KC1 medium of pH6.2. According to this, we selected pH 5-6 as our determination acid range. By pretreatment with A12(SO4)3, we eliminated the interferences of Fe3+ and other ions, and developed fluorescent FIA determination method of Ce3+ which could be applied to soil and stream sediment analysis. The fluorescence intensity value has a good line relationship, which can be expressed by the equation of △F=663600C-0.041(n=10, r=0.9997), with the concentration of Ce3+ in the range of 2.0×10-7-2.0×10-3mol/l and the detection limit is 6,0×10-9mol/l, There being 120-150 samples could be determinated in an hour. The recovery ratio for soil and stream sediment was 93.6-108.1% and 96.0-106.4%(n=10)respectively. The relative standard deviation of measurment of two kinds of sample was 0.64% and 4.65% respectively.
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  • 收稿日期:  1992-11-26
黄承志, 迟锡增, 朱铿, 马春琪. 流动注射荧光分析法用于土壤及水系沉积物中铈(Ⅲ)含量的测定[J]. 环境化学, 1994, 13(1): 65-70.
引用本文: 黄承志, 迟锡增, 朱铿, 马春琪. 流动注射荧光分析法用于土壤及水系沉积物中铈(Ⅲ)含量的测定[J]. 环境化学, 1994, 13(1): 65-70.
shu
Huang Chengzhi, Chi Xizeng, Zhu Keng, Ma Chunqi. A STUDY ON DETERMINATION OF CERIUM(Ⅲ)IN SOIL AND STREAM SEDIMENT BY FLOW INJECTION FLUORESCENCE ANALYSIS[J]. Environmental Chemistry, 1994, 13(1): 65-70.
Citation: Huang Chengzhi, Chi Xizeng, Zhu Keng, Ma Chunqi. A STUDY ON DETERMINATION OF CERIUM(Ⅲ)IN SOIL AND STREAM SEDIMENT BY FLOW INJECTION FLUORESCENCE ANALYSIS[J]. Environmental Chemistry, 1994, 13(1): 65-70.
shu

流动注射荧光分析法用于土壤及水系沉积物中铈(Ⅲ)含量的测定

  • 1.  西南师范大学环境化学研究所, 重庆630715;
  • 2.  北京师范大学化学系, 北京100815
  • 收稿日期:  1992-11-26

摘要: 研究表明Ce3+在pH6.2KCI介质中以254.0nm紫外光激发时,在352.0nm外发出具有恒定强度的荧光.因而可选择pH 5—6作为测定酸度条件,利用Al2(SO4)3消除Fe3+等离子的干扰,建立起Ce3+的流动注射荧光分析法.方法的线性范围是2.0×10-7-2.0×10-6mol/l,一元回归方程△F=663600C-0.041(n=103 v=0.9997),检测限6.0×10-9mol/l,测定频率120—150次/h.该法成功地用于标准土壤和水系沉积物分析,其回收率和变异系数分别为93.6—108.1%和96.0—106.4%(n=10);0.064%和4.65%.

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