A new simple, cheap, and rapid method to increase the sensitivity of pencil graphite electrode (PGE) to determine Linagliptin (LNG) was developed by modified PGE with copper microparticles (Cu-PGE).The preparation of the disposable modified sensor electrode depended on the electrodeposition of Cu-microparticles on the GPE that can be applied for determined LNG by complexed it with Cu +2 ions and m...