Abstract：The accurate determination of nickel, cooper and lithium in Ni-Cu-Li/SiO2 catalyst is of great significance to investigate the influencing factors on the catalytic performance of Ni-Cu-Li/SiO2 catalyst. The sample was digested in closed system at 160℃ for 100min with 5mL of hydrochloric acid, 3mL of nitric acid and 4mL of hydrofluoric acid. Ni 231.604nm, Cu 327.396nm and Li 670.784nm were selected as the analytical lines. The method for determination of nickel, copper and lithium in Ni-Cu-Li/SiO2 catalyst by inductively coupled plasma atomic emission spectrometry (ICP-AES) was established. The correlation coefficients of calibration curves of elements were all higher than 0.999. The limit of detection of nickel, copper and lithium was 0.0006%, 0.0002% and 0.00005%, respectively. The limit of quantification was 0.002%, 0.0007% and 0.0002%, respectively. The contents of nickel, copper and lithium in two Ni-Cu-Li/SiO2 catalyst samples were determined according to the experimental method. The relative standard deviations (RSD, n=6) of determination results were all less than 4.0%. The recoveries were between 90% and 103%.
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