EFFICIENCY OF A NEW POLY(ACRYLAMIDRAZONE-HYDRAZIDE LACMOID) CHELATINGFIBER FOR PRECONCENTRATING AND SEPARATING TRACES OF CHROMIUM, GALLIUM, INDIUM AND TITANIUM FROM SOLUTIONS - DETERMINATION BY ICP-OES

A new poly(acrylamidrazone-hydrazide lacmoid) chelating fibre has been synthesized from poly-acrylonitrile fibre and used for the preconcent ration and separation of traces of Cr(III), Ga(III), ln(III) and Ti(IV ) from solutions with satisfactory results. These ions can quantitativ ely be enriched by the chelating fibre at a flow-rate of 6 ml/min at p H 6, and quantitatively desorbed with 10 ml of eluent at a rate of 4 m l/min. The chelating fibre reused ten times can still quantitatively c oncentrate traces of the above ions; twenty to two hundred-fold excess es of coexistent ions caused only little interference. With concentrat ions of 10 ng/ml Cr(III) and Ti(IV), and 50 ng/ml Ga(III) and In(III), the RSD was in the range of 1.4-4.6%. The contents determined in real samples were generally in agreement with the results obtained by HG-A AS; the recoveries of added standards were > 96%.