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  Indian J Med Microbiol
 

Figure 3: High performance liquid chromatography chromatograms of linagliptin and metformin at different concentrations in the linearity range. (a) 2 μg/mL linagliptin and 400 μg/mL metformin; (b) 4 μg/mL linagliptin and 800 μg/mL metformin; (c) 6 μg/mL linagliptin and 1200 μg/mL metformin; (d) 8 μg/mL linagliptin and 1600 μg/mL metformin; (e) 10 μg/mL linagliptin and 2000 μg/mL metformin; (e) 12 μg/mL linagliptin and 2400 μg/mL metformin

Figure 3: High performance liquid chromatography chromatograms of linagliptin and metformin at different concentrations in the linearity range. (a) 2 μg/mL linagliptin and 400 μg/mL metformin; (b) 4 μg/mL linagliptin and 800 μg/mL metformin; (c) 6 μg/mL linagliptin and 1200 μg/mL metformin; (d) 8 μg/mL linagliptin and 1600 μg/mL metformin; (e) 10 μg/mL linagliptin and 2000 μg/mL metformin; (e) 12 μg/mL linagliptin and 2400 μg/mL metformin