| 纳米硅羟基磷灰石分离富集-火焰原子吸收法测定水样中痕量铅 |
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| 引用本文： | 任红英,周方钦,李改云,戴斐.纳米硅羟基磷灰石分离富集-火焰原子吸收法测定水样中痕量铅[J].分析科学学报,2010,26(1). |
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| 作者姓名： | 任红英 周方钦 李改云 戴斐 |
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| 作者单位： | 湘潭大学化学学院,环境友好化学与应用省部共建教育部重点实验室,湖南湘潭,411105 |
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| 摘 要： | 提出了纳米硅羟基磷灰石(Si-HAP)分离富集,火焰原子吸收光谱法(FAAS)测定水样中痕量铅的新方法。考察了铅在纳米Si-HAP上的吸附动力学、最佳酸度和吸附容量。实验结果表明:在最佳实验条件下,纳米Si-HAP能定量、快速地吸附水中的痕量Pb2+,其静态吸附容量24.33 mg/g;吸附在纳米Si-HAP上的Pb2+可用0.01mol/L EDTA-Ca完全洗脱。本法对Pb2+的检出限为1.33 ng/mL,相对标准偏差为4.0%(n=11,c=1μg/mL),加标回收率在94.9%~102.0%之间。方法用于实际水样中铅的测定,结果满意。
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| 关 键 词： | 纳米Si-HAP 分离富集 铅 火焰原子吸收法 |
Determination of Trace Pb in Water by Flame Atomic Absorption Spectormetry after Separation/Preconcentration with Nanometer-sized Silicon Hydroxyapatite |
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| REN Hong-ying,ZHOU Fang-qin,LI Gai-yun,DAI Fei.Determination of Trace Pb in Water by Flame Atomic Absorption Spectormetry after Separation/Preconcentration with Nanometer-sized Silicon Hydroxyapatite[J].Journal of Analytical Science,2010,26(1). |
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| Authors: | REN Hong-ying ZHOU Fang-qin LI Gai-yun DAI Fei |
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| Institution: | Key Laboratory of Environmentally Friendly Chemistry and Applications of Ministry ofEducation;College of Chemistry;Xiangtan University;Xiangtan 411105 |
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| Abstract: | A new method for the determination of trace Pb with nanometer-sized Si-HAP separation/preconcentration followed by flame atomic absorption spectrometry determination was proposed.The adsorption kinetics,effect of pH,and adsorption capacity of Pb2+ on nanometer-sized Si-HAP were studied.It was found that trace Pb could be adsorbed on nanometer-sized Si-HAP under the optimum conditions and was completely eluted by 0.01 mol/L EDTA-Ca.The static adsorption capacity of Pb2+ on nanometer-sized Si-HAP was 24.33 mg... |
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| Keywords: | Nanometer-sized Si-HAP Separation/Preconcentration Lead Flame atomic absorption spectrometry |
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