Rajana, N.; Srikanth, B.; Ramana, D.; Yarbagi, K. M.; Madhavan, P.; Babu, J. M.; Basavaiah, K.; Devi, D. R. Simultaneous Determination of Sodium, Potassium and Magnesium Counter Ions in Three Drugs: Pantoprazole Sodium, Losartan Potassium and Omeprazole Magnesium by Ion Chromatography. ajc 2018, 30, 2022-2028.