Objective To establish an ion chromatography method for the simple and rapid analysis of ammonium nitrogen in medical organization sewage.
Methods After a certain amount of samples diluted to volume with ultrapure water, on-line dialysis was developed for the solution pretreatment.
Results The linear range of this method was 0.20-20 mg/L with the correlation coefficient r > 0.999 9. The detection limit of NH4+-N was 0.018 mg/L, the relative standard deviation (RSD) was less than 3.0%, and the recovery was between 96.2% and 100.1%.
Conclusion The on-line dialysis pretreatment can effectively eliminate organic and other interfering substances to purify the samples. It is a quick and simple method to determine the ammonium nitrogen in medical organization sewage.
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