Comparison of masking agents for antimony speciation analysis using hydride generation atomic fluorescence spectrometry  

作　　者：Jianhong XI Mengchang HE Kunpeng WANG Guizhi ZHANG 

机构地区：[1]School of Chemistry and Environmental Engineering, Shanxi Datong University, Datong 037009, China [2]State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing 100875, China

出　　处：《Frontiers of Environmental Science & Engineering》2015年第6期970-978,共9页环境科学与工程前沿（英文）

摘　　要：A sensitive atomic spectrometric method for the redox speciation analysis of Sb in water is described. The proposed method is based on the selective generation of stibine from Sb（III） in a continuous flow system using non-dispersive atomic fluorescence spectrometry for detection. The effects of the HCI concentration on the fluorescence intensities of Sb（III） and Sb（V） were investigated. The results indicated that atomic fluorescence emission due to Sb（V） can constructively interfere with the determination of Sb（III）. For the determination of Sb（III）, four compounds were tested as masking agents to inhibit the generation of stibine from Sb（V）. The effects of the concentrations of the masking agents and of HC1 on the fluorescence signals from Sb（III） and Sb（V） were studied. The results indicated that citric acid and NaF can successfully suppress hydride generation from Sb（V）. To evaluate the developed methodology and the influence of the matrix, the recovery of Sb（III） from natural water that was spiked with different Sb（III） and Sb（V） concentrations was tested.A sensitive atomic spectrometric method for the redox speciation analysis of Sb in water is described. The proposed method is based on the selective generation of stibine from Sb（III） in a continuous flow system using non-dispersive atomic fluorescence spectrometry for detection. The effects of the HCI concentration on the fluorescence intensities of Sb（III） and Sb（V） were investigated. The results indicated that atomic fluorescence emission due to Sb（V） can constructively interfere with the determination of Sb（III）. For the determination of Sb（III）, four compounds were tested as masking agents to inhibit the generation of stibine from Sb（V）. The effects of the concentrations of the masking agents and of HC1 on the fluorescence signals from Sb（III） and Sb（V） were studied. The results indicated that citric acid and NaF can successfully suppress hydride generation from Sb（V）. To evaluate the developed methodology and the influence of the matrix, the recovery of Sb（III） from natural water that was spiked with different Sb（III） and Sb（V） concentrations was tested.

关 键 词：Sb（III） Sb（V） determination maskingagents hydride generation （HG-AFS） 

分 类 号：TQ421.36[化学工程] X832[环境科学与工程—环境工程]