A Study on Kinetic Fluorometric Determination of Hydroquinone

A new kinetic fluorimetric method has been proposed for the determination of trace hydroquinone. The method was based on the inhibitory effect of hydroquinone on the catalytic oxidation of pyronine Y by potassium periodate in the presence of vanadium(Ⅴ) in dilute sulfuric acid solution. The optimum kinetic conditions of experiments have been studied,and the influence of various factors were investegated. The linear range of the determination was 0.01～2.5 mg/L and the detection limit was 0.006 mg/L.The method has been applied to determining hydroquinone in water samples,and the recoveries were in range of 98.8%～101.6% with the RSDs of 2.5%～2.9%.