Studies on Fluorescent Characteristics and Analytical Application of Cerium(Ⅲ) in Potassium Chloride Medium

Chem. J. Chinese Universities ›› 1993, Vol. 14 ›› Issue (10): 1358.

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Studies on Fluorescent Characteristics and Analytical Application of Cerium(Ⅲ) in Potassium Chloride Medium

HUANG Cheng-Zhi, CHI Xi-Zeng

Department of Chemistry, Beijing Normal University, Beijing, 100875

Received:1992-10-31 Revised:1993-04-30 Online:1993-10-24 Published:1993-10-24

Abstract

Abstract: Our research showed that the constant fluorescence of Ce³⁺ in the medium of KCl with pHlower than 6.2 could be used to determine trace cerium when it was excited at 252.4 nm.Our working acid range is pH 5-6 and the interference of Fe³⁺ was eliminated by addition of Al₂(SO₄)₃.Over the range of 0- 3.0× 10^-5 mol/L Ce³⁺, the equation of ΔF=2.37× 10⁶C -0.001(n=10, r=0.9999) was abided and the determination limit was 6.0×10^-9 mol/L.The recovery and relative standard deviation for GBW07103 rock reference material was 95.0%-103.2% and 4.18(n=10) respectively.The determination results of GBW07402 soil and GBW07311 stream sediment reference material were satisfactory.

Key words: Cerium(Ⅲ), Potassium chloride, Fluorescence analysis, Coagulant

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HUANG Cheng-Zhi, CHI Xi-Zeng . Studies on Fluorescent Characteristics and Analytical Application of Cerium(Ⅲ) in Potassium Chloride Medium[J]. Chem. J. Chinese Universities, 1993, 14(10): 1358.

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Studies on Fluorescent Characteristics and Analytical Application of Cerium(Ⅲ) in Potassium Chloride Medium

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