Abstract:Refined nickel is a high-quality raw material for stainless steel smelting. The refined nickel products include general nickel and nickel bean. The impurity elements should be detected. The sample was dissolved with nitric acid (1+1). Si 251.612 nm, Mn 257.610 nm, P 178.217 nm, Fe 259.940 nm, Cu 324.754 nm, Co 238.892 nm, Mg 279.553 nm, Al 396.153 nm, Zn 206.191 nm and Cr 267.716 nm were selected as analytical lines.The background interference was eliminated by off-peak background deduction correction method. The calibration curve was prepared by nickel-free matrix matching method. The content of 10 elements in refined nickel (including silicon, manganese, phosphorus, iron, copper, cobalt, magnesium, aluminum, zinc and chromium) was determined by inductively coupled plasma atomic emission spectrometry (ICP-AES). The linear correlation coefficients of calibration curves of elements were higher than 0.999 5. The detection limits of elements were between 0.000 12% and 0.001 9%. The content of silicon, manganese, phosphorus, iron, copper, cobalt, magnesium, aluminum, zinc and chromium in refined nickel sample and Nickel200 standard sample was determined according to the experimental method. The relative standard deviations (RSD, n=11) were between 1.0% and 10%. The found results of standard sample were consistent with the certified values. The recoveries for refined nickel samples were between 90% and 105%.
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