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A single‐piece solid‐contact Pb2+‐selective electrode was prepared by adding a thiophene oligomer into the ion‐selective cocktail directly. The one‐step fabrication yielded an electrode with Nernstian response spanning a wide concentration range of 10−3–10−8 mol L−1, and detection limit as low as 5.6×10−9 mol L−1. The electrode had a quick response time of approximately 10–15 s and showed excellent...
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