The color fading reaction of pyrocatechol violet with iodate ion in stronger acid was studied and a method for determination of iodine in the salt was proposed.

• 研究了在强酸性条件下，邻苯二酚紫与碘酸根离子的褪色反应，拟定了测定加碘食盐中碘离子简便、快速的分析方法，确定了该褪色反应的最佳褪色条件。