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用JP-2型示波极谱仪在乙二胺-钛铁试剂-硝酸铵作底液，利用铜的极谱催代波测定连翘中铜的含量．通过对标准参考物质潞觉参中铜的测定，表明本固定方法较准确、连翘已被国家技术监督局批准为标准物质（GBWE090014）．
The content of copper in the forsythia was determined using a polarographic detonation wave of copper using a JP-2 oscillopolarographic spectrometer in an ethylene diamine-titanium iron reagent-ammonium nitrate base solution. The determination of copper in the standard reference material has shown that this method is more accurate and Forsythia has been approved as a standard substance by the National Technical Supervision Bureau (GBWE090014).