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《Chemical Research In Chinese Universities》 1990-06
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The Determination of Binary Heavy Rare Earth Mixture by Proportional Equation Method

Xu Liang, Gu Zhicheng (Department of Chemistry, Tungji University, Shanghai)  
When a binary mixture was determined with the proportional equation method according to the difference of reaction rates, the two equations could be set up by selecting two special times. t=0 and t→88 , if the reaction is reversible. Because of the initial concentration and the equilibrium concentration are independent of the reaction rate, the strict control of time in the experiment is unnecessary and a good result could be obtained. Based on this principle, the possibility of determining the binary heavy rare earth mixture by means of the ligand exchange reaction between RE arsenazo 3 and CyDTA is discussed. Experimental results show that the relative error is less than 5% when the mixture of Dy and Er is in the range of 1 : 5-5 : 1 at 10-100 μg/25 mL level.
【Fund】: 国家自然科学基金
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【Citations】
Chinese Journal Full-text Database 2 Hits
1 Xu Liang, Gu Zhicheng (Department of Chemistry, Tongji University, Shanghai);The Mathematical Model for Simultaneous Determination of Rare Earth Mixture with Differential Kinetic Analysis by Means of Ligand-Exchange Reaction[J];Chemical Research In Chinese Universities;1990-02
2 Xu Liang, Gu Ztucheng (Department of Chemistry, Toagji University, Shanghai);A New Method for Determination of the Kinetic Parameter of Reversible Reaction[J];Chemical Research In Chinese Universities;1990-05
【Co-citations】
Chinese Journal Full-text Database 4 Hits
1 Zhu Zhongliang, Huang Jianyong, Li Tonghua, Zhang Junyan (Department of Chemistry,Tongji University, Shanghai 200092);Simultaneous Determination of Tungsten(Ⅵ ) and Molybdenum (Ⅵ ) by Principal Component Regression and Masking Agent[J];Chinese Journal of Analytieal Chemistry;1998-10
2 Zheng Yongxi (Department of Chemistry, Tsinghua University, Beijing 100084);Photometric Analysis[J];Chinese Journal of Analysis Laboratory;1991-04
3 GU Zhi-cheng, Xu Liang (Department of Chemistry, Tongji University, Shanghai, 200092);Determination of Heavy Rare Earth Mixtures with Differential Kinetics-Factor Analysis[J];Chemical Research In Chinese Universities;1991-06
4 ZHA Fei,WANG Yong cheng,HOU Jing guo (College of Chemistry & Chemical E ngineering,Northwest Normal Univer sity,Lanzhou 730070,China);Application of chromotropic acid a zo-type reagents in kinetic spectr ophotometric analysis[J];Metallurgical Analysis;2001-06
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