According to our ion chromatography results, the level of nitrates in San Luis Obispo's tap water is over 10 times the EPA's maximum contamination limits. And according to their own website, consumption of high levels of nitrates can be fatal in infants under 6 months. Granted, the value we got is way outside the range of our calibration curve,
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The problem was an extraneous peak that threw off my peak counting. Apparently there was some kind of impurity in one of our unknowns that made the sulfate peak look like it was in the right place to be nitrate if you weren't looking closely at the scale at the bottom of the chromatogram.
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