USE OF PHENYLGLYCINE-N-PHENYLHYDROXYLAMINE IN GRAVIMETRIC-DETERMINATION OF SOME METAL-CATIONS

Alpha-Amino phenyl acetyl-N-phenylhydroxamic acid has been prepared, i dentified by microanalysis, IR and NMR. The prepared compound was used in gravimetric determination of Cu(II), Ni(II), Zn(II), Mn(II), Al(II I) after precipitation of metal complex. The reagent was used for sepa ration of a mixture of binary catinos by either adjustment of acidity or using a masking agent. The precipitate is weighed as M(C14H13N2O2)2 in the case of divalent cations and as M(C14H13N2O2)3 for trivalent c ation after drying at 110-120-degrees-C. The gravimetrically determina tion of iron(III) and vanadium was failed. The interfering ions were d etermined. The accuracy is generally more than 0.3%.