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M. Ghaedi,P. Mokhtari,M. Montazerozohori,A. Asghari,M. Soylak 한국공업화학회 2014 Journal of Industrial and Engineering Chemistry Vol.20 No.2
Multiwalled carbon nanotube impregnated by bis(5-bromosalicylidene)-1,3-propandiamine (BBSPN)was synthesized and applied as adsorbent for the enrichment of trace amount of Pb2+ ion subsequenttheir determination by flame atomic absorption spectroscopy (FAAS). The influences of the analyticalparameters including pH, amount of ligand and adsorbent, type and condition of eluent and samplevolume on the Pb2+ ion recoveries were investigated. The optimum pH value for the separation of Pb2+ion on the new sorbent was 6 and the adsorbed Pb2+ ion could be completely eluted by using 5.0 mL of2.0 mol L-1 HNO3 solutions with 0.015 g of ligand and 0.100 g of adsorbent. Common coexisting ions didnot interfere with the separation and determination of target metal ions. The method has high sorption–preconcentration efficiency with relative standard deviation less than 4.0%, especially for leaddetermination in radish, vegetable, potato, tomato and cheeps.