摘要
在硫酸介质中,铬(Ⅵ)对溴酸钾氧化甲基橙褪色反应有显著的催化作用。将反相流动注射分析技术应用于该反应体系,建立了一种快速测定铬(Ⅵ)的分析方法。在优化试验条件下,铬(Ⅵ)的线性范围为0～3.0 mg/L,检出限为0.03 mg/L。采用该方法测定工业废水和电镀废液中的铬(Ⅵ),其相对标准偏差≤1.2%,加标回收率为94.5%～96.7%,结果令人满意。
Chromium （ Ⅵ ） has the significant catalytic effect on the oxidation of methyl orange by potassium bromate in sulfuric acid medium. A method for determination of chromium （ Ⅵ ） by reversed flow injection spectrophotometry was established. Under the optimized conditions, the linear range of chromium （Ⅵ） is 0 to 3.0 mg/L, and the detection limit is 0.03 mg/L. When the method is used to determine chromium （Ⅵ） in industrial wastewater and electroplating waste liquor, the relative standard deviation is equal to or less than 1.2%, and the recovery with standard addition is 94.5% to 96.7% with a satisfactory result.
出处
《中国给水排水》
CAS
CSCD
北大核心
2011年第16期96-98,共3页
China Water & Wastewater
基金
江苏省"青蓝工程"优秀骨干教师科研基金资助项目(90250886700155)
关键词
反相流动注射
催化光度法
铬(Ⅵ)
reversed flow injection
catalytic spectrophotometry
chromium （Ⅵ）
