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14. Determination of trace aluminum by fluorescence quenching method based on catalysis of potassium chlorate oxidizing alizarin red

Author

Zeng Li-Qing, Hu Shi-Rong, Liu Jiaming, Li Longdi, Wang Yan, Chen Li, Lin Shao-Qin, and Lin Xuan

Subjects
Models, Molecular, Potassium Compounds, Inorganic chemistry, Molecular Conformation, chemistry.chemical_element, ALIZARIN RED, Anthraquinones, Sensitivity and Specificity, Catalysis, Analytical Chemistry, chemistry.chemical_compound, Aluminium, Oxidizing agent, Humans, Instrumentation, Spectroscopy, Detection limit, Perchlorates, Potassium chlorate, Fluorescence, Atomic and Molecular Physics, and Optics, Trace Elements, Kinetics, Spectrometry, Fluorescence, chemistry, Thermodynamics, Oxidation-Reduction, Aluminum, Hair
Abstract

A new method for the determination of trace aluminum has been proposed. It is based on the fact that alizarin red can emit strong and stable fluorescence at 80 °C for 30 min and Al3+ can effectively catalyze potassium chlorate oxidizing alizarin red to form non-fluorescence complex which cause the fluorescence quenching. The linear dynamic range of this method is 0.040–4.00 ng l−1 with a detection limit of 5.3 pg l−1. The regression equation can be expressed as ΔIf = 8.731 + 21.73 c A l 3 + (ng l−1), with the correlation coefficient r = 0.9992 (n = 6). This sensitive, rapid and accurate method has been applied to the determination of trace aluminum(III) in human hair and tea samples successfully. What is more, the mechanism of catalyzing potassium chlorate oxidizing alizarin red by the fluorescence quenching method is also discussed.

Published
2004

18. Determination of Trace Bismuth by a Solid Substrate Room Temperature Phosphorescence Quenching Method Based on Anionic Polymeric Acryclic Acid Lead Particles Containing Luminescent Eosine Molecules

Author

Hu, Shi‐Rong, primary, Cui, Xiao‐Jie, additional, Li, Lai‐Ming, additional, Li, Fei‐Ming, additional, Yang, Xiao‐Jin, additional, Gao, Wen‐Yan, additional, Zheng, Ai‐Fang, additional, Li, Long‐Di, additional, and Liu, Jia‐Ming, additional

Published
2006
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