IC Data Analysis

Calculate the concentrations (in mg/L) of each of the five anions in your calibration standard solutions.

Use the chromatograms from your calibration standard solutions to determine the retention times for each of the five anions. Notice that the peak heights and areas should rise and fall in the same order as the anion concentrations you calculated in step 1.

Record peak areas for each anion peak in your calibration chromatograms.

Make calibration plots for each anion by plotting the peak area vs the concentration. For each plot determine the slope, y-intercept, and R-squared value.

Record the peak areas for each anion in both sample chromatograms (tap water and unknown).

Use the calibration plots and the peak areas from your water samples to calculate the concentration of each anion in each water sample.

Submit your data and results in the Report Form on LabArchives.