For NMR study of organic-Inorganic perovskite materials like CH3NH3PbI3, CH3NH3PbBr3, CH3NH3PbCl3 solid state NMR approach was used in every published literature but not liquid approach. Solid state NMR approach of perovskite materials takes long time duration. Why we con,t use liquid NMR approach for study of these materials for the detection of, Pb, I, Br, Cl etc ?