| 手控注射式钛酸锶钡多孔球富集器分离富集-火焰原子吸收法测定水中铅和镉 |
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| 引用本文： | 张东,李楠,高頔.手控注射式钛酸锶钡多孔球富集器分离富集-火焰原子吸收法测定水中铅和镉[J].分析化学,2009,37(8). |
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| 作者姓名： | 张东 李楠 高頔 |
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| 作者单位： | 1. 沈阳理工大学环境与化学工程学院,沈阳,110168
2. 辽宁省朝阳市环境监测站,朝阳,122000 |
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| 摘 要： | 以D311树脂为模板,采用溶胶-凝胶法制备了纳米钛酸锶钡多孔球,用X射线衍射仪(XRD)、扫描电子显微镜(SEM)和傅立叶变换红外光谱仪(FTIR)进行了表征.考察了Pd2+和Cd2+的吸附和解脱条件.将微球装柱,制成注射式富集器,研究了此富集器对水中痕量Pd2+和Cd2+的富集性能.结果表明: 此法合成的多孔球,由钙钛矿结构的纳米钛酸锶钡组成,晶体平均粒径为21 nm,球体表面布满了不规则的纳米孔洞.当pH 4～7时,此多孔球对水中的Pd2+和Cd2+具有很强的吸附能力,静态吸附容量分别为61.9和14.8 mg/g.由多孔球装柱制成的手控注射式富集器,可成功实现对水中Pd2+和Cd2+的同时吸附.用2 mol/L HNO3洗脱后,火焰原子吸收测定.建立了手控注射式纳米钛酸锶钡富集器分离富集、FAAS法测定水中痕量Pd2+和Cd2+的新方法.此方法对Pd2+和Cd2+的检出限分别为0.099和0.0034 μg/L.用于水样中痕量Pd2+和Cd2+的富集和原子吸收测定,回收率分别为97.8%～106.5%和93.0%～100.7%.
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| 关 键 词： | 纳米钛酸锶钡 多孔球 富集 铅 镉 火焰原子吸收光谱 |
Determination of Lead and Cadmium in Water by Flame Atomic Absorption Spectrometry after Separation/Pre-concentration with Manual-Controlled Injection Porous Nano-Barium-Strontium Titanate Microspheres Separator |
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| ZHANG Dong,LI Nan,GAO Di.Determination of Lead and Cadmium in Water by Flame Atomic Absorption Spectrometry after Separation/Pre-concentration with Manual-Controlled Injection Porous Nano-Barium-Strontium Titanate Microspheres Separator[J].Chinese Journal of Analytical Chemistry,2009,37(8). |
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| Authors: | ZHANG Dong LI Nan GAO Di |
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| Affiliation: | ZHANG Dong1,LI Nan2,GAO Di1 1(School of Environmental and Chemical Engineering,Shenyang Ligong University,Shenyang 110168)2(Chaoyang Environmental Monitoring Station,Chaoyang 122000) |
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| Abstract: | Using D311 resin as template,porous nano-barium-strontium titanate microspheres(PBST)were prepared by the sol-gel method,and characterized by XRD,SEM and FTIR.Applied to the adsorption for lead and cadmium in water,the conditions of adsorption and elution were studied.Using micro-column packed with PBST,joining with injector,a new manual-controlled injection separator was prepared.The enrichment capability of the manual-controlled injection PBST separator for lead and cadmium was investigated.The results sh... |
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| Keywords: | Nano-barium-strontium titanate porous microspheres pre-concentration lead cadmium flame atomic absorption spectrometry |
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