Direct Electrochemistry Bchavior of Heme on Ppy-DDSB Modified Electrode

Abstract

Abstract: Electrochemical behavior of heme on polypyrrole -dodecylbenzene sulfo nic acid modified electrode was investigated.Factors affecting electrochemical reaction speed were r esearched by cyclic voltammetry.A n ovel direct electroanalyticalmethodfordeterminationofhemewas developed.Poly pyrrolewas astablemediaforelectr ontransferof heme.Heme was quasi -reversible oxidation -reduced on surface of Ppy -DD SB modified glass -carbon elec-trode.The 1.5 th differential of the sensitive reduction peak electric current occurred at -206.mv could be used to de-termine the trace heme.A linear rela tionship between the concentration and the 1.5 th differential of the peak electric current of heme in the range of5.0×10 -6 ～1.0× -8 was obtained.

Key words: Heme , Chemical modified electrode , Polypyrrole , Direct electrochemistry

CHENG Fa-Liang, NING Man-Xia, MO Jin-Yuan, DAI Xiao-Yun. Direct Electrochemistry Bchavior of Heme on Ppy-DDSB Modified Electrode[J]. FOOD SCIENCE, 2002, 23(7): 115-118.

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Direct Electrochemistry Bchavior of Heme on Ppy-DDSB Modified Electrode

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