A direct and selective electrochemical hydrogen sulfide sensor.

ABSTRACT: Continuous, in situ detection of hydrogen sulfide (H₂S) in biological milieu is made possible with electrochemical methods, but direct amperometry is constrained by the generation of elemental sulfur as an oxidative byproduct. Deposition of a sulfur layer passivates the working electrode, reducing sensitivity and causing performance variability. Herein, we report on the use of a surface preconditioning procedure to deposit elemental sulfur on a glassy carbon electrode prior to measurement and evaluate performance with common analytical metrics. The lack of traditional anti-poisoning techniques (e.g. redox mediators, cleaning pulses) also allowed for facile surface modification with electropolymerized films. For the first time, a series of electropolymerized films were characteri

SUBMITTER: Brown MD 

PROVIDER: S-EPMC6641862 | biostudies-literature | 2019 Jan

REPOSITORIES: biostudies-literature