ICP-AES Determination of Calcium Iron Nickel Vanadium in Petrol Coke

The petrol coke sample was digested with mixed solution of HNO3-HClO4,and the amounts of Ca,Fe,Ni,V in sample solution were determined by ICP-AES.Wavelengths of 396.847,238.204,231.604 and 309.310 nm were selected as analytical lines for the determination of Ca,Fe,Ni and V,respectively.Values of RSD′s (n=6) for Ca,Fe,Ni and V were in the range of 1.4%-3.0%,and detection limits (3δ) found were less than 0.040 mg·L-1.The proposed method was used in the determination of the 4 elements in petrol coke,giving values of recovery in the range 96.2%-102.4%.The results obtained was in conformity with those obtained by AAS.