新体系过氧化氢-中性红催化光度法测定亚硝酸根

Determination of Nitrite by Hydrogen Peroxide -Neutral Red Kinetic Photometry

研究了硫酸介质中,痕量亚硝酸根催化过氧化氢氧化中性红褪色反应及其动力学条件,建立了动力学光度法测定亚硝酸根的简便方法。lg(A_0/A)与亚硝酸根浓度在0～0.6μg/25mL范围内呈线形关系,方法的检出限为4.3×10^(-10)g/mL。

In sulphuric acid medium, the oxidation of neutral red with hydrogen peroxide catalyzed by trace nitrite and kinetic conditions have been studied. A simple kinetic photometry method for determining trace nitrite has been developed. Beer's law is obeyed for nitrite in the range of 0 -0.6μg/25mL and the detection limit is 4.3×10-10g/mL