Abstract
The highly selective detection of dopamine (DA) against 3,4-dihydroxyphenylacetic acid (DOPAC), L-ascorbic acid (AA), and uric acid (UA) was studied using a sputter deposited indium tin oxide electrode. The sensitivity of the electrode surface was more than 100 times higher for DA than for DOPAC, AA and UA as revealed by voltammograms obtained in a phosphate buffer. The DA response is linear from 10−6 to 10−3 M in the presence of 0.1 mM AA, suggesting that high selectivity is achieved in the mixed solution.
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