Abstract
An electrochemical sensor for the sensitive determination of guanine has been developed, which is based on the electrodeposition of a nanostructured platinum thin film on a glassy carbon electrode. The effects of the electrodeposition time of the platinum thin film, pH, square-wave frequency and electroactive interferents on the voltammetric response of the sensor were evaluated. The optimized sensor exhibited excellent performance for the detection of guanine with a high sensitivity (157.8nAμM−1), a low detection limit (3.1×10−8M), a wide linear range (0.1–500μM), as well as good reproducibility, stability, and selectivity.
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