The complete antigen of papaverine was synthesized according to the method of 1-ethyl-3-(3-dimethylaminopropyl)carbodiimide hydrochloride(EDC·HCl) and the gold colloidal sol was synthesized by adding 1.5 mL trisodium citrate to 50.0 mL HAuCl4·3H2O.The nano gold labeled papaverine antibody probe was prepared by adding 2.0 mL polyclonal antibody to 20.0 mL gold colloidal sol at pH 8.65.A rapid and sensitive method for the detection of papaverine in foods using the prepared probe was developed.The optimum cond...