摘要
利用微波在线消解水样,将流动注射分析技术与分光光度法相结合,建立了一种在线测定水中总氮的快速分析方法。在优化试验条件下,该方法对TN的检出限为0.04 mg/L,对总氮含量为0.491 mg/L的标准样品测定11次的相对标准偏差为1.2%。采用该方法测定河水、生活污水、工业废水水样中的TN含量,其相对标准偏差≤1%,加标回收率为97%-101%,结果令人满意。
A rapid method for determination of total nitrogen in water by on-line microwave digestion and flow injection-spectrophotometry was established. Effects of concentration of reagents and other conditions were optimized. A detection limit of 0.04 mg/L total nitrogen is achieved. The relative standard deviation is 1. 2% for the determination of a reference water sample of 0.491 mg/L total nitrogen （ n = 11 ）. The proposed method is successfully applied to the analyses of several samples of river water, domestic wastewater and industrial wastewater, with relative standard deviations of less than 1.0% and recoveries of 97% to 101% by the standard addition method.
出处
《中国给水排水》
CAS
CSCD
北大核心
2007年第4期76-78,共3页
China Water & Wastewater
基金
江苏省高校自然科学基金资助项目(05KJD150219)
徐州建筑职业技术学院青年科研基金资助项目(JYA304-06)
关键词
微波消解
流动注射
总氮
microwave digestion
flow injection
total nitrogen
作者简介
电话：（0516）83889404 E-mail：sulingxuzhou@163．com
