催化动力学光度法测定亚硝酸根

Determination of Trace Nitrite by Catalytic Kinetic Spectrophotometry

研究了在磷酸介质中．亚硝酸根催化碘酸钾氧化偶氮胂Ⅰ褪色反应的适宜条件与影响因素。建立了动力学光度法测定痕量亚硝酸根的新方法．方法线性范围为0-80．0μg/L，检出限为0．68μg/L，该催化反应用于水样中亚硝酸根的测定，结果满意．

The determination of trace nitrite with catalytic kinetic spectrophotometry was described. The principle of determination based on the NO2^ - can catalyze the oxidation and decoloration of arsenazo （ Ⅰ ） by KIO3^ - in H3PO4 medium. The linear range is 0 -80.0 μg/L,and the detection limit is 0.68 μg/L. The proposed method was applied in the determination of nitrite in water samples with satisfactory.