An electrochemical adaptation of Ellman's test.

Journal article

The electrochemically initiated reaction of thiols with N,N-diethyl-p-phenylenediamine has been coupled with an existing colorimetric sensing reaction developed by Ellman as a means of providing an electrochemical adaptation of the latter whereby the total thiol species present in a sample can be determined. The detection methodology has been proven to be robust with a linear range for cysteine from 2-120 microM, a limit of detection of 1.17 microM and has shown selectivity against a wide range of potential interferences. The efficiency of the methodology has been examined in the determination and recovery of thiol species in three growth tissue media, which contain a number of common biological interferences.

Authors: Nekrassova, O; White, P; Threlfell, S; Hignett, G; Wain, A

• Publication status: Published
• Journal: Analyst
• Volume: 127
• Issue: 6
• Pages: 797-802
• Publication date: 2002-06-01
• DOI: 10.1039/b202780c
• EISSN: 1364-5528
• ISSN: 0003-2654
• Language: English