Synthesis of Magn etite Anio n-exchange Nanoparticles an d Their Application for Sep aration an d Preonc entration of Methyl Phospho nicAcid

The Chemical We apons Conv ention (CWC), which came into force in April ۱۹۹۷, forbi ds the develo pment, pro duction, stockpiling, or use of chemical w eapons (CW) [۱]. Among Chemical Warfar e Agents (CWA), nerve agents are known to b e highly toxic and pow erful inhibitors of acety lcholinester ase. The no nvolatile and highly p olar Methylphosphoni c acid is a poor UV abs orber. Moreover, since it is read ily soluble in water, it s presence can be expected in soil and water of contaminate d regions w ith nerve ag ents. In order to measure the ultratrace level of MPA in water, an analy tical metho d with low limit of dete ction (LOD) level is required. Solid-phase extr action (SPE) has been widely used for its high selectivity and good reproducibility [۲, ۳]. D etection of Ultra traces of alkylphosphonic acids are u nique challenges for th e analytical chemists. In this paper, we explored a new method to direct extraction of MP A from wat er by magne tite amine- nanoparticles as a sorbe nt in solid phase extraction.