preconcentration of mo(ii) on micro crystalline modified with functionalized-nano graphene

a organic-solution-processable functionalized-graphene (spfgraphene) material has been studied on pre-concentration and determination of trace mo(ii)ions. in this process, the effects of ph solution, elution conditions on pre-concentration of trace mo(ii) were studied and the effect of interfering ions was also investigated. a selective method for the fast determination of trace amounts of mo (ii) ions in water samples has been developed. method has been developed for preconcentration of mo on organic-solution-processable functionalized-graphene (spfgraphene) adsorbent in the ph range 5.0–10.0, prior to its spectrophotometric determination, based on the oxidation of bromopyrogallol red at λ = 517 nm. this method makes it possible to quantitize mo in the range of 6.9×10−9 to 2.7×10−5 m, with a detection limit (s/n = 3) of 1.78×10−9 m. this procedure has been successfully applied to determine the ultra-trace levels of mo in the environmental samples, free from the interference of some diverse ions. the precision, expressed as relative standard deviation of three measurements is better than 3.0%.