Yi Bingzh
2013
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Journal
Precious Metals
Abstract
A new digestion method of octanoate dimer catalyst was introduced, the conditions of digestion methods were emphatically studied. The different digestion processes and dissolution methods were compared. The results showed that 0.1~0.2 g Rh octanoate dimer sample could be digested completely with 12 mL HNO3and 3 mL H2O2at 160℃ in a PTFE jar for 4 h. The operation of the digestion method was easy without of the Rh loss. The gravimetry with nitrate cobaltic hexamine was used to determinate the rhodium content of 26.30%, and the RSD was 0.099%. This method is accuracy and precision compared with other methods.