Electrified Soft Interface as a Selective Sensor for Cocaine Detection in Street Samples
L. Poltorak (TU Delft - OLD ChemE/Organic Materials and Interfaces)
I.M.A. Eggink (TU Delft - Applied Sciences)
Marnix Hoitink (Student TU Delft)
EJR Sudhölter (TU Delft - OLD ChemE/Organic Materials and Interfaces)
Marcel De de Puit (TU Delft - OLD ChemE/Organic Materials and Interfaces, Nederlands Forensisch Instituut (NFI))
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Abstract
A straightforward, direct, and selective method is presented for electrochemical cocaine identification in street samples. The sensing mechanism is based on a simple ion transfer reaction across the polarized liquid-liquid interface. The interfacial behavior of a number of cutting agents is also reported. Interfacial miniaturization has led to improved electroanalytical properties of the liquid-liquid interface based sensor as compared with the macroscopic analogue. The reported method holds great potential to replace colorimetric tests with poor selectivity for on-site street sample analysis.
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