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Stripping measurements of hydrogen peroxide based on biocatalytic accumulation at a horseradish peroxidase/ferrocene/carbon paste electrode
Author(s) -
Ciszewski Aleksander,
Górski Zbigniew
Publication year - 1995
Publication title -
electroanalysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.574
H-Index - 128
eISSN - 1521-4109
pISSN - 1040-0397
DOI - 10.1002/elan.1140070516
Subject(s) - hydrogen peroxide , horseradish peroxidase , chemistry , stripping (fiber) , ferrocene , electrode , peroxide , inorganic chemistry , phosphate buffered saline , carbon fibers , peroxidase , nuclear chemistry , electrochemistry , chromatography , organic chemistry , materials science , composite number , composite material , enzyme
Carbon paste electrodes containing horseradish peroxidase and ferrocene accumulate charge in the presence of hydrogen peroxide, the discharge of which gives the chronoamperometric stripping current. Hence a 50‐fold enhancement of the response for 50 nM hydrogen peroxide is obtained following 60s preconcentration. The hydrogen peroxide measurements were made in 0.05 M phosphate buffer of pH 7.4. The relative standard deviation at the 50 nM level is 9.8%. The electrode is useful for hydrogen peroxide determination for more than two days.