摘要
文章通过寻找氯化汞和碘化钾的最佳比例并用超声波加速氯化汞的溶解,配置得到的纳氏试剂较国标方法配置得到的纳氏试剂稳定。测定污水与清洁水中氨氮准确、精密度高,实测样品中氨氮的回收率为101.1%,相对标准偏差(n=6)为0.46%,曲线斜率不受温度影响。测定结果与原纳氏试剂一致,且节约试剂,避免二次污染,可应用于污水及清洁水中氨氮含量测定。
This thesis has fond out the best proportion between mercuric chloride and potassium iodide during the processing of Nessler＇s reagent. By accelerating the dissolving of mercuric chloride with ultrasonic waves, the Nessler＇s reagent made in the best proportion between mercuric chloride and potassium iodide is more stable than that made by the international standardized meth- od. The accuracy and precision of ammonia and nitrogen tested with this Nessler＇ s reagent is high. The rate of recovery of ammonia and nitrogen is 101.1% and the relative standard deviation （ n = 6） is 0.46%. And the slope of the curve is not affected by the temperature. The result is the same as that obtained with the original Nessler~ reagent. And this method can save reagent and prevent from secondary pollution. So the reagent can be used to test the content of ammonia and nitrogen in the polluted and fresh water
出处
《盐业与化工》
CAS
2011年第6期33-35,共3页
Jounral of Salt and Chemical Industry
关键词
氨氮
纳氏试剂
超声波
ammonia and nitrogen
Nessler＇ s reagent
ultrasonic waves
