摘要
设计了水中镍(Ⅱ)自动在线分析仪,优化了仪器的最佳测试条件,并用该仪器用于环境水样中Ni(Ⅱ)的测定。在NaOH(pH=12)介质中,以过硫酸铵为氧化剂,镍与丁二酮肟作用形成酒红色可溶性络合物,于波长465 nm处进行测定。方法在0.1~8.0 mg/L范围内呈良好线性关系,对浓度为0.5 mg/L、3 mg/L、6 mg/L的镍离子溶液进行测定,相对标准偏差分别为0.11%、0.12%、0.15%。方法的检出限为0.002 m g/L (3σ)。仪器操作简便、消耗试剂量少、测定快速、灵敏、适于现场即时监测。
A new kind of flow injection on-line nickel analyzer for fast and accurate determination of nickel ion in industrial wastewater was developed .The device was based on a soluble red wine color com-plex formation between nickel ion and dimethylglyoxime (C4 H8 N2 O2 ) in sodium hydroxide (NaOH) solu-tion medium with ammonium persulfate (C4 H8 N2 O2 ) as the oxidant .The absorbance at 465 nm was pro-portional to the concentration of nickel ion in aqueous solution in the range of 0.05-8 mg/L .The detection limit was 0.002mg/L (3σ) .The concentralion of Ni2+ for 0 .5 ,3 .0 and 6 .0mg/L were determined ,and the relative standard deviations (n=11) were 0 .11% ,0 .12% and 0 .15% 0 .5 ,3 .0 and 6 .0 mg/L respec-tively .
出处
《分析仪器》
CAS
2014年第2期7-10,共4页
Analytical Instrumentation
关键词
在线分析仪
镍离子
流动注射
分光光度法
工业废水
on-line analyer
nickel ion
flow injection
spectropholometry
industrial wastewater