Abstract：The refractory high carbon alloy steel was completely digested in hydrochloric acid and nitric acid by microwave digestion. The content of major alloy elements was determined by inductively coupled plasma atomic emission spectrometry (ICP-AES). The digestion method, the selection and dosage of digestive reagent, the effect of water dosage on digestion of high-silicon sample, and the microwave digestion procedures were discussed. The optimal digestion conditions were finally obtained as below: 0.2 g of sample was weighed, and then 10.0 mL of water, 5.0 mL of hydrochloric acid and 5.0 mL of nitric acid were added successively. The sample was treated by microwave digestion at 180 ℃. For the refractory high carbon alloy steel samples containing high-silicon (the mass fraction of silicon was higher than 1.0%), more water should be added. Several refactory high carbon alloy steel samples were treated according to the experimental method, and the content of main alloy elements (Si, Mn, Ni, Cr, Mo and V) was determined by ICP-AES. The relative standard deviations (RSD, n=8) were between 0.23% and 4.7%. Four standard samples of refractory high carbon alloy steel were treated according to the experimental method. The content of Si, Mn, Ni, Cr, Mo and V was determined by ICP-AES. The found results were consistent with the certified values.
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