Potentiometric Determination of Dopamine Using a Solid-Contact Polymer Membrane Ion-Selective Electrode Tanji Yin1 2 3 ∗ and Wei Qin1 1Key Laboratory of Coastal Zone Environmental Processes, Yantai Institute of Coastal Zone Research YIC , Chinese Academy of Sciences CAS ; Shandong Provincial Key Laboratory of Coastal Zone Environmental Processes, YICCAS, Yantai, Shandong 264003, P. R. China 2So...