Determination of cobalt in pure nickel by N_2O-C_2H_2 flame atomic absorption spectrometry

A method for the determination of cobalt in pure nickel by N2O-C2H2 flame atomic absorption spectrometry has been proposed.The optimal measurement conditions,such as analytical line,burner height,lamp current were chosen.The interference from the coexistence ions was eliminated by adding lanthanum oxide and sodium metaborate.Under the optimal exerimental conditions,the calibration curve is linear over the range of 0-30 μg/mL for cobalt.The detection limit for cobalt is 0.04 μg/mL.The method has been applied in the determination of cobalt in pure nickel,with the relatioe standard deviation of below 1% and the average recovery of 97.4%.