DETERMINATION OF SCANDIUM IN ETV-ICP-AES BY USING PMBP AS CHEMICAL MODIFIER

A novel method for the introduction of scandium(Sc), based on the low- temperature volatilization of 1-phenyl-3-methyl-4-benzoyl-pyrazolonate [5](PMBP) chelate from graphite furnace, was reported for electrother mal vaporization(ETV) /ICP-AES. The formation and volatilization of Sc /PMBP chelate in the furnace as well as its affecting factors were inv estigated in detail. It was found that the existence of extra PMBP was favourable to form the Sc/PMBP chelate and vaporizes/transports quant itatively into ICP. Under optimized conditions, the detection limit wa s determined to be 0.3 ng/mL, The relative standard deviation (RSD) fo r 1 ng of scandium was 2.4%(c=0.1 mu g/mL, n=7), The scandium content in the standard material vehicle exhaust particulates determined by th e proposed method were in good agreement with the reference values.