Investigation of Enhancing Effect for Hydride Generation-Atomic Fluorescence of Transition Metal Elements
SUN Han-wen1,SUO Ran1,2
1. College of Chemistry and Environmental Science, Hebei University, Key Laboratory of Analytical Science and Technology of Hebei Province, Baoding 071002, China 2. Department of Food Science, Agricultural University of Hebei, Baoding 071001, China
Abstract：A mechanism of hydride generation based on disassembly reaction of hydrogen-transferred interim state [M(BH4)m]* was developed by investigating the effect of reaction medium acidity on hydride generation. The effects of Co2+ and Ni2+,phenanthroline and 8-hydroxyquinoline on hydride generation-atomic fluorescence signals of Zn, Cd, Cu and Ni were studied, respectively, and their enhancing mechnism was discussed. The enhancing effect Co2+ and Ni2+ on the fluorescence signals of Zn and Cd was due to the increase in transmission efficiency of hydride of Zn and Cd. There was a synergic enhancing effect between phenanthroline or 8-hydroxyquinoline and Co2+ on the fluorescence signals of Zn and Cd, however no synergic enhancing effect between phenanthroline and 8-hydroxyquinoline on the fluorescence signals of Zn and Cd. The simulative action of cationic surfactant, anion surfactant and non-ionic surfactant surfactant to hydride generation was investigated. It is shown that both cationic surfactant and non-ionic surfactant have obvious enhancing effect on the fluorescence signals of analytes because of the decrease in surface tension of reaction solution. The release characteristics of hydride from the absorption solution containing surfactant was ulteriorly examined by using graphite furnace atomic absorption spectrometry, and the mechanism of enhancing effect of surfactant on hydride generation and transmission was proposed.
Key words：Transition metal elements;Hydride generation;Atomic fluorescence;Enhancing effect;Mechanism
孙汉文1,锁然1,2 . 过渡金属元素氢化物发生-原子荧光增敏效应研究[J]. 光谱学与光谱分析, 2008, 28(11): 2684-2690.
SUN Han-wen1,SUO Ran1,2. Investigation of Enhancing Effect for Hydride Generation-Atomic Fluorescence of Transition Metal Elements. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2008, 28(11): 2684-2690.
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