Fig. 3From: Impurity profiling method development and validation of metformin hydrochloride and teneligliptin hydrobromide hydrate in their combination tablet dosage form by using RP-HPLC with UV/PDA detectora Linearity of cyanoguanidine, b linearity of melamine, c linearity of MTF, d linearity of TNG impurity A, e linearity of TNG impurity B, f linearity of TNGBack to article page