  Accelerator mass spectrometry (AMS) measurement of $^{59}$Ni has been
established at CIAE with the HI-13 tandem accelerator and the recently
developed $\Delta E$-Q3D detection system. $^{59}$Ni standard and commercial
NiO samples were measured to check the performance of the $\Delta E$-Q3D
detection system on $^{59}$Ni isobar separation and suppression. An overall
suppression factor of about 10$^{7}$ for the interfering isobar $^{59}$Co
resulting in detection sensitivity as low as 3.8$\times 10^{-13}$ atomic ratio
($^{59}$Ni/Ni) has been obtained. Based on these techniques, the AMS
measurement method of $^{59}$Ni with high sensitivity is developed.
