Abstract：The complex high-salt matrix of nickel electrolyte has interference with the monitoring of micro copper. In this experiment, the rotating disk electrode atomic emission spectrometry was combined with standard addition method. The sample pretreatment was not required and there was no matrix effect. The improved calibration curve was used to determine the micro copper in different intermediate solution of nickel electrolyte. According to the evaporation curve of element, the pre-combustion time of 6 s and acquisition time of 7-30 s were determined. The precombustion excitation improved the wettability of the disk electrode, thus ensuring the stability of the injection quantity. Reasonable exposure time could improve the analysis speed on the premise of ensuring the intensity sensitivity of analytical elements, and the single detection time was less than 35 s. Ni 324.845 7 nm was selected as the internal standard to correct the excitation behavior and injection volume error. The limit of detection was 0.15 mg/L. The content of micro copper in different intermediate solution of nickel electrolyte was determined according to the experimental method. The relative standard deviations (RSD, n=6) were less than 12%, and the recoveries were between 98% and 110%.
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