光度法化肥淋溶氨氮在线检测技术  

On-line spectrophotometric detection technology of ammonia nitrogen in fertilizer pollution

作　　者：余立祥[1] 吴跃进[1] 倪晓宇[1] 王琦[1] 段俊伟 解晓明 

机构地区：[1]中国科学院合肥物质科学研究院技术生物与农业工程研究所,合肥230031 [2]安徽皖仪科学仪器有限公司,合肥230031

出　　处：《分析仪器》2014年第5期13-19,共7页Analytical Instrumentation

基　　金：支撑服务国家战略性新兴产业(YDJBCHF-2011-001);企业创新重大攻关项目;中国科学院合肥物质科学研究院院长基金(YZJJ201321)

摘　　要：本文采用氨氮纳氏试剂光度法,将显色、检测过程改进为自动稀释取样、自动添加显色剂并进行流动检测,研究结果表明:在流量为15mL/min,经过50秒的显色后,进行测量,其线性方程为y=1.522x+0.003,相关系数R2=0.998,加标回收率为93%~110%,相对标准偏差小于2%,检测周期在2s^1h内可调,可在化肥淋溶实验中对氨氮进行连续在线检测,也可应用于水污染源中氨氮排放量的实时监测。In this paper,the process of the classical method to measure ammonia nitrogen by Nessler was improved to be automatic,including sample dilution,chromogenic agent addition and flow detection,the whole process was controlled in a minute.The results show that the equation of working curve is y=1.522x＋0.003,the correlation coefficient is 0.998,the recovery rate is 93%to 110%,the relative standard deviation is less than 2%.The testing cycle of this method is adjustable within 2s-1h,it can be used in the fertilizer leaching experiments for continuous on-line detection of ammonia nitrogen,also can be applied to real-time monitoring of the ammonia nitrogen in water pollution emissions.

关 键 词：化肥淋溶 氨氮 吸光度 纳氏试剂 

分 类 号：X832[环境科学与工程—环境工程] O657.3[理学—分析化学]