Studies on the Determination of Trace Iridium in Fossil of Dinosaurian Eggs with Catalytic LTLS

Chem. J. Chinese Universities ›› 1996, Vol. 17 ›› Issue (10): 1544.

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Studies on the Determination of Trace Iridium in Fossil of Dinosaurian Eggs with Catalytic LTLS

YAN Hong-Tao, YANG Sheng-Ke

Department of Chemistry, Northwest University, Xi'an, 710069

Received:1995-10-30 Online:1996-10-24 Published:1996-10-24

Abstract

Abstract: A new method for the determination of trace iridium in fossil of dinosaurian eggs with catalytic laser thermal lensing spectrometry is presented in this paper.The method is based on the kinetic reaction in which trace iridium catalyzes the decomposition of hydrogen peroxide in basic condition and on the determination of the magneson Ⅱfading speed.The detection limit is 5.2×10^-12 g/mLfor iridium.The linear range of the calibration curve is 0.2～35 ng/mLof iridium and correlation coeffcient is 0.9974.The method has been applied to the determination of the trace iridium in fossil of dinosaurian eggs in Nanyang region,China.

Key words: Fossil of dinosaurian eggs, Thermal lensing spectrometry, Catalytic reaction, Detemination of trace iridium

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YAN Hong-Tao, YANG Sheng-Ke. Studies on the Determination of Trace Iridium in Fossil of Dinosaurian Eggs with Catalytic LTLS[J]. Chem. J. Chinese Universities, 1996, 17(10): 1544.

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Studies on the Determination of Trace Iridium in Fossil of Dinosaurian Eggs with Catalytic LTLS

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