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Fast scan cyclic voltammetry used to measure changing concentrations of dopamine. A carbon fiber electrode is used to quickly change the voltage to oxidize dopamine and reduce dopamine-O-quinone. The resulting alternating current is used to find the instantaneous concentration of dopamine in the extracellular fluid.
Electrochemical detection of chemical ... as carbon-fiber microelectrodes for sensing molecules in ... for simultaneous detection of dopamine and serotonin in vivo". ...
Amperometry in chemistry is the detection of ions in a solution based on electric current or changes in electric current.. Amperometry is used in electrophysiology to study vesicle release events using a carbon fiber electrode.
A dopamine molecule consists of a catechol structure (a benzene ring with two hydroxyl side groups) with one amine group attached via an ethyl chain. [14] As such, dopamine is the simplest possible catecholamine, a family that also includes the neurotransmitters norepinephrine and epinephrine. [15]
Voltammetry is the study of current as a function of applied potential. Voltammetric methods involve electrochemical cells, and investigate the reactions occurring at electrode/electrolyte interfaces. [4] The reactivity of analytes in these half-cells is used to determine their concentration.
Two isoreticular MOFs based on phthalocyanine and naphthalocyanine organic linkers have been tested for sensing of neurotransmitters. In this study authors were able to get a very low limit of detection, NH 3 (0.31–0.33 ppm), H 2 S (19–32 ppb) and NO (1–1.1 ppb) at a driving voltage of (0.01–1.0 V). [ 15 ]
This method can reveal the reduction potential of an analyte and its electrochemical reactivity. This method, in practical terms, is non-destructive since only a very small amount of the analyte is consumed at the two-dimensional surface of the working and auxiliary electrodes .
3,4-Dihydroxyphenylacetic acid (DOPAC) is a metabolite of the neurotransmitter dopamine. Dopamine can be metabolized into one of three substances. One such substance is DOPAC. Another is 3-methoxytyramine (3-MT). Both of these substances are degraded to form homovanillic acid (HVA).