| 环境水样中痕量铅的中孔分子筛Al-MCM-41分离富集-火焰原子吸收法测定 |
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| 引用本文： | 栾杰,周方钦,李晶,亓俊霞,林品言.环境水样中痕量铅的中孔分子筛Al-MCM-41分离富集-火焰原子吸收法测定[J].分析测试学报,2010,29(5). |
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| 作者姓名： | 栾杰 周方钦 李晶 亓俊霞 林品言 |
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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： | 建立了中孔分子筛Al-MCM-41分离富集-火焰原子吸收光谱法测定水样中痕量铅的新方法。采用扫描电镜(SEM)、红外光谱(IR)等检测方法对自制的中孔分子筛Al-MCM-41吸附材料进行了表征,优化了中孔分子筛Al-MCM-41对试液中痕量铅的吸附和解吸条件。在pH5.5时,室温振荡20 min,中孔分子筛Al-MCM-41能定量、快速吸附水中的痕量Pb2+,其静态饱和吸附容量为2.5 mg/g。吸附在中孔分子筛Al-MCM-41上的Pb2+可用0.2 mol/L EDTA完全洗脱。其他金属离子共存不影响铅的测定。洗脱铅后的吸附材料经再生可循环使用10次以上。Pb2+的线性范围为0.5~30 mg/L,富集后方法检出限(3σ)为0.05μg/L,对5 mg/L的Pb2+溶液平行测定11次,相对标准偏差为1.2%,加标回收率为98%~104%。该方法用于环境水样中铅的测定,结果满意。
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| 关 键 词： | 中孔分子筛Al-MCM-41 分离富集 火焰原子吸收光谱法 环境水 铅 |
Determination of Trace Lead in Environmental Water by Flame Atomic Absorption Spectrometry after Separation/Preconcentration with Mesoporous Al-MCM-41 |
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| LUAN Jie,ZHOU Fang-qin,LI Jing,QI Jun-xia,LIN Pin-yan.Determination of Trace Lead in Environmental Water by Flame Atomic Absorption Spectrometry after Separation/Preconcentration with Mesoporous Al-MCM-41[J].Journal of Instrumental Analysis,2010,29(5). |
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| Authors: | LUAN Jie ZHOU Fang-qin LI Jing QI Jun-xia LIN Pin-yan |
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| Institution: | LUAN Jie,ZHOU Fang-qin,LI Jing,QI Jun-xia,LIN Pin-yan(Key Laboratory of Environmentally Friendly Chemistry and Applications of Ministry of Education,College of Chemistry,Xiangtan University,Xiangtan 411105,China) |
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| Abstract: | A new method for the determination of trace lead based on mesoporous Al-MCM-41 separation/preconcentration combing with flame atomic absorption spectrometry(FAAS) was proposed.The characteristic of the synthesized material was investigated by scanning electron microscope(SEM) and infrared spectrometry(IR).The optimal conditions of adsorbing and desorbing on mesoporous Al-MCM-41 material for Pb2+ were investigated.After surging 20 minutes at room temperature and pH 5.5,the lead could be quantitatively adsorb... |
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| Keywords: | mesoporous Al-MCM-41 separation and preconcentration flame atomic absorption spectrometry environmental water lead |
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