摘要
利用被亚硝基铁氰化钠催化的铵(NH4+)与次氯酸盐和碱性苯酚溶液三者之间反应所生成的蓝色络合物(靛酚蓝)(λmax=660 nm)和应用FS-Ⅳ型流动分析仪,对水中氨(包括铵)氮作光度测定。对该方法的灵敏度、准确度和精密度进行了试验。测得的检出限、相对标准偏差及回收率值依次为0.003 mg.L^-1,〈2%及在90%~111%范围间。
By the use of the reaction among NHg, hypochlorite and alkaline solution of phenol, catalyzed by sodium nitroferricyanide, to produce a blue colored complex (λmax=660 urn) and by the use of the instrument FS-Ⅳ Flow Analyzer, ammonia (including ammonium) nitrogen in water was determined photometrically. Sensitivity accuracy and precision of the method were tested, and the values of D. L. , RSD and recovery obtained were 0. 003 mg · L^-1 , 〈2% and in the range of 90%-111% respectively.
出处
《理化检验(化学分册)》
CAS
CSCD
北大核心
2007年第1期43-44,共2页
Physical Testing and Chemical Analysis(Part B:Chemical Analysis)
关键词
片段流动分析
氨及铵氮
水样
Segment flow analysis
Ammonia and ammonium nitrogen
Water