Determination of trace impurities in som enickel compounds by flame atomic absorption spectrometry after solid phase extraction using aAmberlite XAD-16 resin

摘要

A simple flame atomic absorption spectrometric(FAAS) procedure for the determiantionof lead,bis-muth,gold,palladium andcadmium as impurities in Raney neckel and nickel oxide was developed using a preconcentration step on an Amberlite XAD-16 resin packed column.Lead,bismuth,gold,palladium and cadmium were quantitatively recovered and separated from a solution containging 1 M HCl and 0.3M Nal by the column system.Effects of thevarious parameters such as reagent concentrations,sample volume,matrix effects,etc.have been in-vestigated.Under optimized conditions,therelative standard deviation of the combined mehtod of sample treatment ,preconcentration and determination with FAAS (n-7) is generally lower than 12%.The limit of detection(3s,n=20) was between 10-270 ng/g.The results were sued for separation andpreconcentration of five trace elements from nickel matrices.