Preparation and application of coated wire polyvinyl chloride membrane ractopamine selective electrode

A new coated wire polyvinyl chloride membrane-tramadol selective electrode based on ractopamine and sodium tetraphenylborate association complex was first reported.The electrode showed Nernst response for ractopamine with a slope of 46mV/pC in the concentration range of 1.0×10-6-1.0×10-2mol/L.The detection limit is 7.9×10-7 mol/L.The electrode has fast response and good reproducibility.The electrode has been used for the determination of ractopamine in the pig urine sample by the standard curve method.The results are consistent with the results obtained by HPLC method.