The interface between two immiscible electrolyte solutions (ITIES) supported on the orifice of a pipet has become a powerful platform to detect a broad range of analytes. We present the detection of γ-aminobutyric acid (GABA) with nanoITIES pipet electrodes for the first time. GABA has a net charge of zero in an aqueous solution at pH ≈ 7, and it has not previously been detected at ITIES. In this work, we demonstrated GABA detection at ITIES in an aqueous solution at pH ≈ 7, where we introduced a novel detection strategy based on “pH modulation from the oil phase”. To the best of our knowledge, this is the first report of such.
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