| 聚对氨基苯磺酸/石墨烯复合修饰电极对尿酸的选择性灵敏测定 |
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| 引用本文： | 孙娜,王宗花,夏建飞,郭新美,张菲菲,夏延致,李延辉.聚对氨基苯磺酸/石墨烯复合修饰电极对尿酸的选择性灵敏测定[J].分析测试学报,2012,31(7):853-857. |
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| 作者姓名： | 孙娜 王宗花 夏建飞 郭新美 张菲菲 夏延致 李延辉 |
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| 作者单位： | 1. 青岛大学纤维新材料与现代纺织实验室国家重点实验室培育基地,山东青岛266071;青岛大学化学化工与环境学院,山东青岛266071
2. 青岛大学纤维新材料与现代纺织实验室国家重点实验室培育基地,山东青岛,266071 |
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| 基金项目： | 国家自然科学基金（20975056，81102411）；山东省自然科学基金（ZR2011BZ004，ZR2011BQ005）；NSFC-JSPS中日合作与交流项目（21111140014）；生命分析化学国家重点实验室开放基金（SKLACLS1110）；山东省泰山学者资助项目（TS20070711） |
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| 摘 要： | 采用电聚合方法在石墨烯纳米片(GN)的表面聚合一层聚对氨基苯磺酸(PABSA),制备了聚对氨基苯磺酸/石墨烯复合修饰玻碳电极(PABSA/GN/GCE)。研究了尿酸(UA)和抗坏血酸(AA)在该修饰电极上的电化学行为。与聚对氨基苯磺酸修饰电极(PABSA/GCE)及石墨烯单层膜修饰电极(GN/GCE)相比,复合修饰电极PABSA/GN/GCE显著提高了对UA和AA的检测灵敏度和分离度。在0.1 mol/L磷酸盐缓冲溶液(pH7.0)中,UA和AA的峰电位差达344 mV,表明PABSA/GN/GCE能实现对UA的选择性测定。UA的峰电流与其浓度呈良好的线性关系,线性范围为1.0×10-7～8.0×10-4mol/L,检出限为4.5×10-8mol/L。该复合修饰电极用于尿样中尿酸的测定,结果满意。
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| 关 键 词： | 对氨基苯磺酸 石墨烯 修饰电极 选择性测定 尿酸 抗坏血酸 |
Selective and Sensitive Determination of Uric Acid on PABSA/GN Composite-modified Glassy Carbon Electrode |
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| SUN Na
,
WANG Zong-hua
,
XIA Jian-fei
,
GUO Xin-mei
,
ZHANG Fei-fei
,
XIA Yan-zhi
,
LI Yan-hui.Selective and Sensitive Determination of Uric Acid on PABSA/GN Composite-modified Glassy Carbon Electrode[J].Journal of Instrumental Analysis,2012,31(7):853-857. |
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| Authors: | SUN Na WANG Zong-hua XIA Jian-fei GUO Xin-mei ZHANG Fei-fei XIA Yan-zhi LI Yan-hui |
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| Institution: | 1(1.The Growing Base for State Key Laboratory,Laboratory of Fiber Materials and Modern Textile,Qingdao University, Qingdao 266071,China;2.College of Chemical and Environmental Engineering, Qingdao University,Qingdao 266071,China) |
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| Abstract: | A PABSA/GN/GCE composite-modified electrode was fabricated by using a graphene nanosheets(GN) modified glassy carbon electrode(GCE)electropolymerized with p-aminobenzene sulfonic acid(PABSA).The electrochemical behaviors of uric acid(UA) and ascorbic acid(AA) on the nanocomposites-modified electrode were investigated.Compared with PABSA/GCE and GN/GCE,the PABSA/GN/GCE improved the resolution and the sensitivity for the determination of UA in the presence of AA.In 0.1 mol/L phosphate buffer solution(pH 7.0),a peak to peak separation of 344 mV was observed,which enabled the selective determination of UA.The peak currents obtained from DPV were linearly related to concentrations of UA in the range of 1.0×10-7-8.0×10-4 mol/L.The detection limit was 4.5×10-8 mol/L.The nanocomposites-modified electrode was adopted for the detection of UA in the human urine with satisfactory result. |
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| Keywords: | p-aminobenzene sulfonic acid graphene nanosheets modified electrode selective determination uric acid(UA) ascorbic acid(AA) |
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