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目的了解快速测定仪测定生活饮用水中氨氮含量的准确可靠性和实用性。方法分别用国标法与快速测定仪测试样品,对比测定结果。结果快速测定仪测定氨氮浓度在0.02 mg/L~2.50 mg/L时,线性关系良好,回归方程为y=0.3136χ+0.0158,相关系数(r)为0.9997,加标回收率为91.70%~99.40%,相对标准偏差(RSD)为1.20%~3.40%。结论快速测定仪准确可靠、简便快捷,可广泛用于生活饮用水中氨氮含量的测定。
Objective To understand the accuracy, reliability and practicability of rapid determination of ammonia nitrogen in drinking water. Methods National standard method and rapid determination of test samples were measured, the results were compared. Results The linear regression equation was y = 0.3136χ + 0.0158 when the ammonia concentration was 0.02 mg / L ~ 2.50 mg / L. The correlation coefficient (r) was 0.9997 and the recoveries were 91.70% ~ 99.40 %, Relative standard deviation (RSD) of 1.20% ~ 3.40%. Conclusion The rapid analyzer is accurate, reliable, simple and quick. It can be widely used in the determination of ammonia nitrogen in drinking water.