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Chromatogram

chr_287.gif

chr_287.gif

Description

Metformin is a biguanide-based anti-diabetic drug. It is a very polar organic compound that has no retention on reversed-phase column unless an ion-pairing reagent is employed. Metformin was retained on a Primesep 200 column based on cation-exchange mechanism. Method can be used for analysis of metformin and related substances in pharmaceutical formulations. Due to low UV activity a more UV-transparent mobile phase is required. Metformin can be also monitored by ELSD and LC/MS with corresponding mobile phase (TFA, ammonium formate or ammonium acetate).

Method Parameters

Mobile PhaseMeCN/H2O
BufferTFA
Flow Rate0.5 ml/min
DetectionUV, 230 nm
Class of CompoundsDrug,  Anti-diabetic medication, Hydrophilic, Ionizable
Analyzing CompoundsMetformin

HPLC Column Used

Primesep 200, 4.6×150 mm, 5 µm, 100A