Determination of Pt and Pd Content in Diatomaceous Earth by Fire Assay-Inductively Coupled Plasma Atomic Emission Spectroscopy
Diatomaceous earth is widely used as a filter aid due to its unique physicochemical properties.Fire assay is a classic method for enriching precious metals,and Inductively Coupled Plasma Atomic Emission Spectroscopy(ICP-AES)can determine the content of precious metals simply,accurately,and quickly.The experiment uses the fire assay to enrich Pt and Pd in diatomaceous earth,and adds silver as a protective agent during the ash blowing process to form composite particles,and uses ICP-AES to determine the content of Pt and Pd in the solution after dissolving the composite particles in nitric acid and hydrochloric acid.During this period,conditional experiments are conducted to determine the optimal experimental conditions and eliminate matrix interference.The experimental results show that the fire assay-inductively coupled plasma atomic emission spectroscopy can be used to determine the content of Pt and Pd in diatomaceous earth,eliminate the matrix interference when ICP-AES directly determines Pt and Pd in diatomaceous earth,and the measurement results are stable,and the method is simple and fast to operate.
fire assay-inductively coupled plasma atomic emission spectroscopydiatomaceous earthPtPddetermination
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