火试金-电感耦合等离子体原子发射光谱法测定硅藻土中Pt、Pd含量

Determination of Pt and Pd Content in Diatomaceous Earth by Fire Assay-Inductively Coupled Plasma Atomic Emission Spectroscopy

硅藻土凭借独特的理化性质,被广泛用作助滤剂。火试金法是经典的贵金属富集方法,电感耦合等离子体原子发射光谱法(Inductively Coupled Plasma Atomic Emission Spectrometry,ICP-AES)可以简单、准确和快速地测定贵金属含量。试验采用火试金法富集硅藻土中的Pt、Pd,并在灰吹过程中加入银作为保护剂,形成合粒,经硝酸、盐酸溶解合粒后采用ICP-AES测定溶液中Pt、Pd含量。其间开展条件试验,得出最佳试验条件,从而消除基体干扰。试验结果表明,火试金-电感耦合等离子体原子发射光谱法可用于测定硅藻土中Pt、Pd含量,消除ICP-AES直接测定硅藻土中Pt、Pd时的基体干扰,测定结果稳定,方法操作简便快速。

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.