After the sample was dissolved in concentrated acid,organic matter and iodine were removed by hydrogen peroxide,and the solution was prepared at an appropriate concentration.The sample was sprayed into the air-acetylene lean flame atomization system of an atomic absorption spectrometer using a hollow cathode lamp as the light source,and the absorbance was measured at 345.3 nm wavelength.The amount of rhodium in the sample was quantified using a standard curve.After verification,the relative standard deviation of the six determinations of the same sample was less than 0.5％,the recovery rate was between 98.4％～101.8％,the detection limit was 0.027 mg/L,and the method was simple to operate and fast to determine,which could meet the requirements for the determination of rhodium content in triiodide rhodium.
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