| 基于钴的磷酸盐离子选择性电极研究 |
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| 引用本文： | 吴世杰,张海云,逯文晶,闫李霞,康琪,潘大为.基于钴的磷酸盐离子选择性电极研究[J].环境科学与技术,2012(Z1):234-238. |
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| 作者姓名： | 吴世杰 张海云 逯文晶 闫李霞 康琪 潘大为 |
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| 作者单位： | 山东师范大学化学化工与材料科学学院;中国科学院烟台海岸带研究所中国科学院山东省海岸带环境过程重点实验室 |
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| 基金项目： | 国家自然科学基金项目(21007087,20975062);山东省自然科学基金项(2008ZRA06004,BS2010HZ030) |
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| 摘 要： | 文章以金属钴为基体,在其表面形成对磷酸二氢盐有良好电化学响应的氧化钴敏感膜,成功的制备了磷酸盐离子选择性电极。详细讨论了不同活化时间和不同活化溶液对磷酸盐检测的线性响应范围、响应斜率及检测限的影响。实验结果表明:该基于钴的磷酸盐离子选择性电极在0.025 mol/L邻苯二甲酸氢钾的底液中,对磷酸二氢盐在10-4~10-1mol/L浓度范围内呈线性响应,其响应斜率为-48.27 mV/dec,检测限为2.27×10-5mol/L,相关系数R2为0.99。该电极具有良好的稳定性和重现性。已成功用于实际自来水样中磷酸二氢盐的检测,结果满意。
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| 关 键 词： | 钴 离子选择性电极 磷酸二氢根 |
A New Phosphate Ion Sensitive Electrode Based on Cobalt |
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| WU Shi-jie,ZHANG Hai-yun,LU Wen-jing,YAN Li-xia,KANG Qi,PAN Da-wei.A New Phosphate Ion Sensitive Electrode Based on Cobalt[J].Environmental Science and Technology,2012(Z1):234-238. |
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| Authors: | WU Shi-jie ZHANG Hai-yun LU Wen-jing YAN Li-xia KANG Qi PAN Da-wei |
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| Institution: | 1.College of Chemistry,Chemical Engineering and Materials Science,Shangdong Normal University,Jinan 250014,China; 2.Key Laboratory of Coastal Zone Environmental Processes,CAS;Shandong Provincial Key Laboratory of Coastal Zone Environmental Processes;Yantai Institute of Coastal Zone Research,Chinese Academy of Science,Yantai 264003,China) |
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| Abstract: | In this paper,a new phosphate ion-sensitive electrode based on a cobalt wire has been successfully designed.The electrode showed a relatively selective potentiometric response toward dihydrogen phosphate which seemed to originate from the CoO layer covering the electrode surface.The response to phosphate at the cobalt wire electrode was depending on the different activation time and activation solution.A linear response with a slope of-48.27 mV per decade was obtained in the concentration range of 10-4~10-1 mol/L with a detection limit of 2.27×10-5 mol/L and a R2 value of 0.99,using a supporting solution containing 0.025 mol/L potassium hydrogen phthalate.The electrode had a long term stability and reproducibility and was also applied to the determination of phosphate in the tap samples with satisfactory results. |
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| Keywords: | cobalt ion selective electrode dihydrogen phosphate |
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