| 巯基改性聚乙烯醇为结合相的薄膜扩散梯度技术 |
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| 引用本文： | 范洪涛,孙挺,薛明智,仝桂锋,隋殿鹏.巯基改性聚乙烯醇为结合相的薄膜扩散梯度技术[J].分析化学,2009,37(9). |
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| 作者姓名： | 范洪涛 孙挺 薛明智 仝桂锋 隋殿鹏 |
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| 作者单位： | 东北大学化学系,沈阳,110004 |
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| 摘 要： | 利用巯基乙酸改性了聚乙烯醇,制得了巯基聚乙烯醇(PVA-SH).研究了以1.0 mmol/L PVA-SH溶液为结合相的薄膜扩散梯度(DGT)装置(PVA-SH DGT)对Cd2+测量的有效性; 考察了pH值、离子强度对PVA-SH DGT累积Cd2+的影响; 测量了PVA-SH DGT对Cd2+的饱和累积容量.实验表明: 巯基乙酸成功地接枝到PVA上,巯基含量为1.65%(wt%); PVA-SH DGT对Cd2+的饱和累积容量为0.234 mol/L;当pH值在5.5～9.9范围内、离子强度在0.0001～0.7 mol/L内基本不影响PVA-SH DGT对Cd2+的累积; PVA-SH DGT能够定量测定水中的Cd2+,回收率为100.7%,线性相关系数r=0.9812.结果表明: PVA-SH可以作为DGT技术新的液态结合相.
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| 关 键 词： | 聚乙烯醇 巯基 薄膜扩散梯度 结合相 镉 |
Preparation of Thiol-Polyvinyl Alcohol and Its Application to Diffusive Gradients in Thin-Films Technique |
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| FAN Hong-Tao,SUN Ting,XUE Ming-Zhi,TONG Gui-Feng,SUI Dian-Peng.Preparation of Thiol-Polyvinyl Alcohol and Its Application to Diffusive Gradients in Thin-Films Technique[J].Chinese Journal of Analytical Chemistry,2009,37(9). |
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| Authors: | FAN Hong-Tao SUN Ting XUE Ming-Zhi TONG Gui-Feng SUI Dian-Peng |
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| Institution: | FAN Hong-Tao,SUN Ting,XUE Ming-Zhi,TONG Gui-Feng,SUI Dian-Peng(Department of Chemistry,Northeastern University,Shenyang 110004) |
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| Abstract: | A new functional thiol-polyvinyl alcohol(PVA-SH) that was applied to the diffusive gradients in thin-films(DGT) technique was prepared with thioglycolic acid to import-SH group into a polyvinyl alcohol(PVA) framework.The validation of DGT device(PVA-SH DGT) with 1.0 mmol/L PVA-SH solution as the liquid binding phase for Cd2+ were studied in synthetic solution.The effects of pH and ionic strength on binding capacity of PVA-SH DGT were assessed.The experiments showed that the thiol groups had been imported in... |
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| Keywords: | Polyvinyl alcohol thiol diffusive gradients in thin-films binding phase cadmium |
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