Does an 'L-arginine doped orthophosphoric acid' crystal exist?

Abstract

The reactive nature of aqueous orthophosphoric acid (H3PO4) towards l-arginine (l-Arg), to form a phosphate salt namely l-arginine phosphate monohydrate (LAP), rules out the doping of any l-arginine into H3PO4. Hence, the reported claim of growth of 'l-arginine doped orthophosphoric acid' crystals by Saradha et al. J. Lumin (2013) is untenable.