催化光度法测定痕量对苯二酚

Catalytic Spectrophotometric Determination of Trace Hydroquinone

在硫酸介质中 ,以草酸为活化剂 ,痕量对苯二酚对碘酸钾氧化天青Ⅱ的褪色反应具有明显的催化作用 ,据此建立了催化光度法测定痕量对苯二酚的新方法。方法的线性范围是 0 .0 4～ 1 .2 0mg L ,检出限为0 0 0 8mg L。方法操作简便 ,灵敏度高 ,选择性好 ,用于自来水、实验室废水和显影液中对苯二酚的测定 。

An catalytic spectrophotometric method was proposed for the determination of trace hydroquinone. The method was based on the catalytic effect of hydroquinone on the oxidation of azure blue II by KIO3, in the presence of in H2SO4 medium oxalic acid as an activitor. The linear range of the determination is 0.04 similar to 1.20 mg/L and the detection limit is 0.008 mg/L. This method is simple, sensitive and selective. It was been used for the determination of hydroquinone in the tap water, waste water and developer with staisfactory results.