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《Physical Testing and Chemical Analysis(Part B:Chemical Analysis)》 2007-07
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Determination of Cobalt(Ⅱ) in Environmental Water by Micro-Column in-Situ Preconcentration and Flow Injection Flame Atomic Absorption Spectrometry

WU Dong-mei1,WANG Ai-xia2(1.National Engineering Research Center For Coal Gas Control CUMT,Xuzhou 221008,China;2.Analysis and Testing Center,Northeast Normal University,Changchun 130024,China)  
Trace amount of cobalt(Ⅱ) in environmental water sample was preconcentrated in situ by adsorption on a micro-column packed with activated carbon which has been loaded with oxine,DDTC and APDC.By using the on-the-spot sampling with the micro-column,traces of cobalt(Ⅱ) in environmental water were enriched continuously.An on-line desorption and FI-FAAS analytical system was proposed for the determination of Cobalt(Ⅱ).Cobalt(Ⅱ) on the micro-column was desorbed with 3 mol·L-1 HNO3 and determined by FAAS.Detection limit(3σ) of the method was found to be 1.13 μg·L-1,in 10 mL of the eluate as sample.In the analysis of 3 water samples by the proposed method,values of RSD′s(n=6) obtained were less than 1%.
【Fund】： 国家自然科学基金(50473032)资助项目
【CateGory Index】： O657.31;X832
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