They also reported a biomimetic potentiometric sensor for the recognition of methylphosphonic acid (MPA). ![]() The sensor responds to atrazine in the pH range 2.5–3.0 over a working range of 0.0001–10 mM, with a detection limit of 0.5 μM. Prasada Rao and co-workers developed a biomimetic potentiometric sensor by dispersing the atrazine-imprinted polymer particles in di- n-octyl phthalate plasticizer and then embedding in a polyvinyl chloride matrix. The membranes were prepared using a mixture of 32.1 wt% PVC, 65.3 wt% bis(2-ethylhexyl) sebacate, 1.85 wt% imprinted polymer, and 0.7 wt% potassium tetrakis (p-chlorophenyl)borate. This was chosen as a Ca 2+-selective ionophore to produce a polymer cavity that would resemble a polyether site, with imprinting being the means to acquire size selection. The monomer used in the fabrication of the electrode was a neutral ionophore N,N'-dimethyl-N,N'-bis(4-vinylphenyl)-3-oxapentadiamide. ![]() The first imprinted polymer ISEs were prepared for calcium and magnesium ions by Mosbach's group. ![]() Schematic diagram for fabrication of a MIP-based PVC membrane sensor.
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