The SPS in the standard solution and the copper electroplating solution was measured by two-dimensional ion chromatography.First, the sample processing module was used to eliminate the copper ions in the matrix, then the sample was separated on the column of the first system, and a fraction was collected in the pre-concentration On the column, the second system was used to determine the linear correlation coefficient of the standard working curve was 0.9999. The three samples were analyzed 15 times. The relative standard deviation of the results was less than 6%, which had good accuracy and precision.
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