光谱学与光谱分析 |
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ICP-AES Determination of Cu2+,Pb2+ and Cd2+ with Adsorption Behavior of Potassium Hexatitanate Whisker |
XU Wan-zhen, LI Chun-xiang, LIU Ai-qin, YAN Yong-sheng* |
Department of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang 212013, China |
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Abstract A new method for the determination of free Cu2+, Pb2+ and Cd2+ in environmental sample using potassium hexatitanate whisker as a solid-phase extractant and inductively coupled plasma-atomic emission spectrometry (ICP-AES) as a sensitive detector has been developed. The adsorption rate of Cu2+,Pb2+ and Cd2+ by potassium hexatitanate whisker was 98% at pH 5.0, and Cu2+,Pb2+ and Cd2+ could be eluted from potassium hexatitanate whisker with HNO3 (C: 3 mol·L-1). The Cu2+,Pb2+ and Cd2+ in environmental samples were preconcentrated with potassium hexatitanate whisker and determined by ICP-AES, the detection limits of Cu2+,Pb2+ and Cd2+ (3σ, n=9) were 0.007 1,0.006 8 and 0.007 1 μg·mL-1,and the relative standard deviations (RSD) were 0.63%, 0.61% and 0.50%, respectively. The method was applied to the determination of analytes in real samples, such as chrysanthemum and loquat leaf. And good results were obtained (recoveries were 90%-102.9%). The results obtained indicate that the potassium hexatitanate whisker has good regenerate capability.
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Received: 2007-08-10
Accepted: 2007-11-20
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Corresponding Authors:
YAN Yong-sheng
E-mail: xuwanzhen1212@163.com
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