A sample matrix-assisted chemical modification approach was developed for graphite furnace atomic Absorption spectrometric determination of bismuth in nickel-based alloy samples.Nickel was used to increase the pyrolysis and atomization temperature in the determination of bismuth,thus the matrix interference was alleviated.In addition,the nickel sample matrix also efficiently increased the sensitivity of bismuth.Macro constituents of nickel-based alloys,such as Cu,Fe and Al,caused minimal interference with the determination of bismuth.Under the optimized experimental conditions,the limit of detection(LOD) for Bi was found to be 1 μg L-1.Standard addition approach was used to calibrate the bismuth content in the nickel-based alloys to achieve the goal of sample matrix-assisted chemical modification.The proposed method features simplicity,rapidness,and high sensitivity.
