Potentiometric Sensor for Determination of Cysteine Based on Graphene Oxide-Lead Porphyrin Composite
نویسنده
چکیده
Combination of the exceptional properties of graphene oxide with the selectivity of lead porphyrin leads to fabricate a novel cysteine-selective sensor. The electrode made of 30% PVC, 53% NPOE, 2% NaTPB and 15% GO-PP was found to show the most favorable behavior. The sensor shows a Nernstian response (58.8 mV decade) in the concentration window of 5.0×10-5.0×10 M with detection limit of 8.0×10 M. The graphene oxide-lead porphyrin composite based sensors displayed a fast and selective response towards cysteine which was successfully applied to the determination of cysteine in real sample (human serum). KeywordsGraphene Oxide Composite, Cysteine, Selective Electrode, Lead Porphyrin, Potentiometry
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