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利用甲基蓝与亚硝酸根反应 ,根据双波长处吸光度的加和值与NO2- 浓度的线性关系 ,提出并建立了测定亚硝酸根含量的新方法。线性范围0.05～1.20mg/L ,用于样品中NO2-的测定均获得满意结果
Using methyl blue reacted with nitrite, a new method for the determination of nitrite content was proposed and established according to the linear relationship between the absorbance at two wavelengths and the concentration of NO2-. The linear range of 0.05 ~ 1.20mg / L, for the determination of NO2- samples were satisfactory results