The proposed method is based on the inhibitory effect of resorcinol on the reaction of potassium periodate oxidation of pyronine Y in phosphoric acid medium.

在磷酸介,量间苯二酚对高碘酸钾氧化吡咯红Y使光猝灭具有抑制作用,据此建立了动光法测定量间苯二酚的新方法。