期刊文献+

采用粉末电极技术改善葡萄糖氧化酶电极的抗干扰性能 被引量:1

Improvement of the Anti-interference Characteristics of GOD Electrode by Using the Powder Microelectrode Technique
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摘要 研究了对电流型GOD电极有干扰作用的抗坏血酸、尿酸、L-半胱氨酸和对-乙酰氨基苯酚在铂、玻碳以及由Ketjenblack碳黑填制的粉末微电极上的电化学行为。结果表明:由于这些杂质的电化学活性较高,难以通过选择电极材料及改变工作电位来完全避免它们的干扰作用。然而,抗坏血酸、尿酸及对-乙酰氨基苯酚在粉末微电极上极限电流是由电极端面液相中的扩散传质所控制的,只与电极的表现直径有关而与其真实表面积无关,因而采用粉末微电极技术可明显地提高GOD电极的信噪比。 The electrochemical behavior of ascorbic acid(AA),uric acid(UA),L-cystein(L-Cys)and acetaminophen(APAP),i.e.the main interference to the GOD electrode,were studied at the Pt,GC and powder microelectrode. Experimental results indicated that,due to the electrochemical activity of these interference,it is difficult to eliminate their interference effects by manipulation of electrede materials or working potential of the GOD electrode. However,it was found that the limiting curtents at the KB electrode are mainly controlled by mass transfer in liquid phase,so it is only related to the geometer size of the electrode,not its rcal surface area. Therefore,it is possible to enhance significantly the signal/noise ratio of the GOD electrode by using the powder microelectrode technique.
作者 陈剑 查全性
机构地区 武汉大学化学系
出处 《电化学》 CAS CSCD 1996年第3期262-273,共12页 Journal of Electrochemistry
基金 国家自然科学基金
关键词 粉末微电极 葡萄糖氧化酶 电极 抗干扰 葡萄糖 Powder microelectrode,GOD electrode,Ascorbic acid,uric acid,L-cystein,Acetaminophen
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参考文献6

  • 1查全性,J Electroanal Chem,1994年,368卷,47页
  • 2Ye L,Anal Chem,1993年,65卷,238页
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同被引文献5

  • 1胡蓉晖,杨汉西,刘金成,李升宪,查全性.微电极定量方法评价贮氢合金的电化学性质[J].电化学,1996,2(4):391-396. 被引量:1
  • 2CHA Chuan-sin, LI Chang-ming, YANG Han-xi, et al. Powder microeletrodes[ J ]. J Electroanal Chem, 1994, 47 : 368--374.
  • 3HU Xiao-hong, AI Xing-ping, YANG Han-xi, et al. A study of LiMn2O4 synthesized from Li2CO3 and MnCO3 [ J ]. J Power Sources, 1998,74:240--243.
  • 4YANG Han-xi, DONG Quan-feng, HU Xiao-hong, et al.Preparation and characterization of LiNiO2 synthesized from Ni(OH)2 and LiOH·H2O[J]. J Power Sources, 1999, 79:256--261.
  • 5XIAO Li-fen, CHEN Jian, CHA Chum-sin. Elimination of the interference of ascorbic acid in the amperometic detection of biomolecules in body fluid samples and the simple detection of uric acid in human serum and urine by using the powder microelectrode technique[ J ]. J Electroanal Chem, 2000, 495 : 27--35.

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