Objective To explore the best condition for the determination of ammonia nitrogen in water.Methods The influence of four factors,including the quality of experimental water,pH value,color development time and color development temperature,on the determination results of ammonia nitrogen is demonstrated.Results Under the conditions of ammonia-free water or ultrapure water,pH value 8-10,color developing time more than 10 min and color developing temperature 20-30℃,the determination accuracy of ammonia nitrogen in water is high.Conclusion The best experimental conditions have high repeatability and accuracy for the determination of ammonia-nitrogen in water,which can effectively improve the accuracy of the determination of ammonia-nitrogen in water.
blank valuepHcolor development timecolor development temperature
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