非平衡流动注射光度法测定微量亚硝酸根的研究

Non-equilibrium Flow Injection Spectrophotometry for Nitrite Determination

采用流动注射分析技术 ,研究了在酸性介质中碱性品红与亚硝酸根的反应 ,用自制的微机化流动注射分析仪准确控制反应时间 ,利用非平衡法原理 ,优化了实验条件 ,建立了测定微量亚硝酸根的新方法。线性范围为0.0～5.0mg/L ,分析速度达每小时测定36次。应用该法直接测定煤矿塌陷湖水、鱼塘水、电厂废水和地下水中的亚硝酸根获得满意结果。

The reaction of nitrite with basic fuchsin in acid medium was studied by flow injection spectrophotometry. The experiment conditions are optimized. A new analytical method for the determination of trace nitrite based on non _ equilibrium principle is established using self _ assembled and computerized flow injection analyzer. The linear range for nitrite is in 0.0～5.0 mg/L, analytical speed is 36/h. The method was applied to direct determination of nitrite in collapse lake water, fishpond water, power plant waste water and well water with satisfactory results.