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Studies on the Electrochemical Behavior of Bleomycin at a co/gc ion implantation modified electrode and Its Application

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Chemical Research in Chinese Universities 2001年第4期17卷 362-367页

作者： HU Jing-bo LI Qi-long Department of Chemistry Beijing Normal UniversityBeijing 100875P.R.China

In a 0. 10 mol/L HAc-NaAc buffer solution (pH = 4. 59), a sensitive reduction peak of bleomycin was observed by linear sweep voltammetry at a co/gc ion implantation modified electrode. The peak potential was-0. 73 V(iw. SCE). The peak current was proportional to the concentration of bleomycin over the range of 5.0 × 10-8-1.0× 10-6 and 1.0× 10-6-1. 0 × 10-5 mol/L with a detection limit of 2.0 × 10-8 mol/L. The electrochemical behavior of the reduction peak of bleomycin at the co/gc modified electrode was studied by linear sweep and cyclic voltammetry and applied to the determination of bleomycin in urine. This method is simple, rapid and reliable. The reduction process is quasi-reversible. The experiments of AES and XPS showed that co was surely implanted into the surface of gcE and the depth distribution of co was in good agreement with Gooses normal distribution; the implanted co at gcE improved the electrocatalytic activity.

关键词： co/gc ion implantation modified electrode Electrochemical behavior Linear sweep voltammetry Bleomycin

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Studies on Electrochemical Behavior of Bleomycin and Its Interaction with DNA at a co/gc ion implantation modified electrode

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Chinese Journal of Chemistry 2002年第3期20卷 267-271页

作者：胡劲波李启隆尚军 Department of Chemistry Beijing Normal University Beijing 100875 China

Electrochemical investigation of Bleomycin (BLM) and its interaction with DNAat a co/gc ion implantation modified electrode was reported for the first time. The electrochemicalbehavior of BLM at co/gc modified electrode has been studied by linear sweep and cyclicvoltammetry, The reaction of BLM with DNA formed an electrochemically nonactive complex, whichresulted in a decrease in the BLM equilibrium concentration and its reduction current. The decreasein peak current was proportional to DNA concentration and could be used to determination DNAconcentration. The equilibrium constant of DNA-BLM complex β was determined to be 5.16 x 10^(16).The experiments of AES and XPS showed that co was surely implanted into the surface of gcE( glassycarbon electrode) and the depth distribution of co was in good agreement with Gaussian normaldistribution; the implanted co at gcE improved the electrocatalytic activity.

关键词： co/gc ion implantation modified electrode linear sweep voltammetry bleomycin DNA

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