Abstract: Using PdCl2 as Pd particle precursor and Ginkgo biloba extract as reducing agent, nano Pd particles from PdCl2 solution were obtained by plant reduction method. The residual Pd2+ ion concentration in the reaction solution was measured by inductively coupled plasma atomic emission spectrometry (ICP-AES) to calculate quantitatively the reduction rate of the reaction. The effects of PdCl2 concentration and particle size of ginkgo leaf dry powder on the reduction rate of Pd2+ were investigated. The results showed that ICP-AES could be used to quantitatively study the plant reduction method, and that the higher the concentration of PdCl2, the smaller the dry powder particles, the higher the reduction rate.

Key words: plant reduction method, palladium nanoparticle, quantitative study, reduction rate