Abstract：The complex formed by Pd and diphenylguanidine (DPG) could be extracted and enriched by solid phase extraction column of MCI-GEL resin. Based on this, a solid phase extraction method of palladium was established. The results showed that the extraction rate of Pd could be up to 99 % under the following conditions: the mole ratio of DPG and Pd in solution was nDPG︰nPd=0.5; the concentration of hydrochloric acid medium was 0.05 mol/L; the flow rate passing through column was 10 mL/min. The extraction capacity of MCI-GEL resin solid phase column was measured by elution curve method, and the result was 4.86 mg/g. The optimal elution solution was acid thiocarbamide solution. Moreover, 4.86 mg/g of palladium could be fully eluted when the elution rate of 3 mL of 20 g/L acid thiocarbamide solution was 1.0 mL/min. The MCI-GEL resin solid phase column was used to separate and determine Pd in synthetic sample in 0.05-2.0 mol/L hydrochloric acid medium, and it proved that in 0.05 mol/L hydrochloric acid medium, Pd could be quantitatively separated from Pt, Fe, Ni, Cu and Zn by calculating the separation coefficient.
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