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在PH＝9．2的硼砂体系中，IO产生一灵敏的单峰极谱波，峰电位为－1．32V（VS.SCE），检测下限为8ng／ml，线性范围为0．008～1μg／ml。经过预先氧化还原处理，使茶叶中I-氧化为IO即可定量测定。用示波极谱法测定茶叶中碘，兼具灵敏、准确、快速、简便、选择性好的优点。
In the borax system with pH = 9.2, IO produced a sensitive unimodal polarographic wave with a peak potential of -1.32 V (VS.SCE), a detection limit of 8 ng / ml and a linear range of 0.008 to 1 μg / Ml. After pre-oxidation and reduction treatment, so that I-oxidation of tea to IO quantitative determination. The determination of iodine in tea by oscillopolarography has the advantages of being sensitive, accurate, rapid, simple and selective.