Potentiometric detection Column liquid chromatography 2 Electrodes 2 Electrolytes 2 Ions 2 LiMn2O4 2 Lipophilic drugs 2 Lithium 2 Lithium compounds 2 Manganese compounds 2 ORR 2 Pharmaceutical formulations 2 Potentiometers (electric measuring instruments) 2 Potentiometric 2 Potentiometric technique 2 Quantitative description 2 RRDE 2 Rotating ring disc electrode 2 Surface concentration 2 acetonitrile 2 acidity 2 ambroxol 2 aqueous solution 2 article 2 bromhexine 2 clenbuterol 2 electrode 2 hexakis(2,3,6,tri o octyl) alpha cyclodextrin 2 ionophore 2 lipophilicity 2