Electrochemical evaluation of lactate dehydrogenase immobilized in polyacrylamide gels
- 1 December 1977
- journal article
- research article
- Published by Wiley in Biotechnology & Bioengineering
- Vol. 19 (12), 1785-1792
- https://doi.org/10.1002/bit.260191205
Abstract
Lactate dehydrogenase (EC 1.1.1.27) has been immobilized in polyacrylamide gels over a platinum grid matrix. The immobilized enzyme is used to oxidize L-lactate in the presence of nicotinamide adenine dinucleotide (NAD+) and femcyanide. The NADH produced is then chemically oxidized back to NAD+by ferricyanide. The coupled reduction of ferricyanide ions to ferrocyanide ions results in a measurable electrochemical potential. This measurable zero-current potential is found to be Nernstian in nature and directly proportional to the logarithm values of L-Iactate concentration over the range of 2 × 10−5to 5 × 10−2M. The results indicate that immobilized lactate dehydrogenase can be incorporated into a system to detect L-Lactate acid in aqueous solutions.This publication has 6 references indexed in Scilit:
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