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Immunoassay system: (A) syringe pump, injector for samples and standards; (B) assembled detection chamber consisting of 2 machined PMMA plates, top plate holds symmetrically placed reference Ag/AgCl 0.6 mm diameter and 0.2 mm platinum counter electrode wires along the entire length of the 8-sensor array. Peek tubing is fitted to connect inlet and outlet; (C) PDMS channel 2.8 × 0.15 × 1.0 cm, volume 60 μL, placed above sensors; (D) Kanichi screen-printed carbon 8-sensor array alone.
