分别采用纳氏试剂比色法、水杨酸盐比色法和离子色谱法对两种浓度不同的水样进行氨氮含量测定，比较不同方法检测的精确度和准确度。结果表明离子色谱法的准确度和精确度比较高，适用于日常生活用水的检测。“,”Respectively using Nessler's reagent colorimetric method, salicylate colorimetric method and ion chromatography method to determine ammonia nitrogen content for two kinds of dif erent water samples, comparing dif erent methods of precision and accuracy. The results show that the accuracy and precision of ion chromatography method is relatively highly, and suitable for the determination of water in daily life.