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AssigneeIndian Institute of Technology Madras (Iit Madras)
InventorsThalappil PRADEEP, Sourav KANTI JANA, Kamalesh CHAUDHARI, Md Rabiul ISLAM
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The present invention relates to a new device for selective arsenic sensing using electrochemically reduced graphene oxide (ERGO) based reusable flexible electrode strip. Active electrode of the device was prepared by a very simple method in which the thin film of graphene oxide (GO) was reduced electrochemically at a low DC potential (0 to -1.5 V). The said device selectively detects As3+ in field water sample within a wide range of concentrations with a limit of detection of less than 25 ppb. More importantly, the selectivity of the electrode is independent of conductivity and TDS levels of measured field water samples which were collected from various parts of India. Selective detection of As3+ by ERGO was controlled by optimizing the surface electronic conductivity through structural modification of it during electroreduction process.
A point-of-care (POC) chronoamperometry device for selective arsenite (As3+) sensing, the said device comprises, a reusable bio-mimic electrode test strip made of electrochemically reduced graphene oxide (ERGO) grown by electroreduction of graphene oxide (GO) on a metallic thin film coated flexible substrate, where,
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