摘要
目的建立更高效且安全的生活饮用水中氨氮测定方法。方法按照《生活饮用水标准检验方法水样的采集与保存》GB/T 5750-2006采集样品,采用连续流动分析仪测定生活饮用水中氨氮,并与纳氏试剂分光光度法进行比较。结果该方法在0.000~2.000 mg/L线性区间内具有良好的线性关系,在低、中、高浓度范围内加标回收率99.00%~106.00%,检出限为0.01 mg/L;采用连续流动分析仪和纳氏试剂分光光度法两种方法分别测定氨氮含量低、中、高3种不同浓度的加标水样,样品测定值低浓度(t=0.734)、中浓度(t=-0.362)和高浓度(t=-0.992)两种方法测定结果差异无统计学意义(均P>0.05)。结论该方法具有样品用量少、检出限低、测定重现性好和效率高的特点。
Objective To establish an effective and safe way of detection for ammonia nitrogen in drinking water. Methods The samples were collected according to the requirement of Standard Examination Methods for Drinking Water Collection and Preservation of Water Samples(GB/T 5750-2006), the ammonia nitrogen in the samples was detected by continuous flow analyzer and compared with the results of nessler reagent spectrophotometry. Results The results showed a good linear relation within the range from 0.000 to 2.000 mg/L. The rate of adding standard recovery was from 99.00% to 106.00% in the range of low, medium and high concentration, with the detection limit of 0.01 mg/L. The spiked water samples with low,medium and high concentration were detected by continuous flow analyzer and Nessler reagent spectrophotometry,respectively. There were no statistical differences(P>0.05) between the two methods in the detection values at low(t=0.734),medium(t=-0.362) and high(t=-0.992) concentration. Conclusions The detection way is of the features of less samples consumption, low detection limit, good reproducibility and high efficiency.
作者
李菁
何川川
杨忠俊
LI Jing;HE Chuan-chuan;YANG Zhong-jun(The Center for Disease Control and Prevention of Xinjiang Uygur Autonomous Region,Urumqi, Xinjiang 830002, China)
出处
《疾病预防控制通报》
2019年第3期87-89,共3页
Bulletin of Disease Control & Prevention(China)
关键词
连续流动分析仪
饮用水
氨氮
Continuous flow analyzer
Drinking water
Ammonia,nitrogen
