From: Extraction of methamphetamine and pseudoephedrine by modified graphene oxide solid phase extraction method coupled to HPLC-UV in urine sample
Pore size diameter (nm)
Pore volume (cm3g− 1)
Specific surface area (m2 g− 1)
GO/Fe3O4/C-nanodot
115.23695
10.161430
22.7133
215.92494
20.157950