▎ 摘　　要

Dinitrotoluene (DNT) is a signature material of all nitro-aromatic explosives including the lethal 2,4,6-trinitrotoluene (TNT). A clay-modified reduced graphene oxide (rGO)-polymer nanocomposite was prepared as sensing electrode for the detection of (DNT) in the aquatic systems. rGO was in situ dispersed in the electro-conductive N-doped phenol/formaldehyde polymer and the clay 'montmorillonite' was coated on the nanocomposite. The clay, containing iron as one of its mineral components, served as the recognition element for DNT. Tested using electrochemical measurement techniques - cyclic voltammetry and differential pulse voltammetry, the prepared sensing electrode exhibited a low detection limit (0.0016 mu M) on signal to noise ratio basis (S/N=3) and excellent linearity (R-2=0.997) over 0.02-10 mg L-1 with high sensitivity value (428 mu A mM(-1) cm(-2)) for DNT. The electrode showed negligible interference with the gravimetric and volumetric salts commonly present in seawater, and also, with explosive derivatives. The separate tests performed in a simulated seawater confirmed the suitability of the prepared electrode for use in field applications.