缺碘地区小麦、玉米中碘含量的测定

Ascertaining the Iodine Content of Wheat and Corn in Iodine Lacking Area

样品经灰化、浸泡、酸化后 ,用过量溴水将其中的 I-氧化为 IO-3 ,再用 KI将 IO-3 还原为 I2 ,以淀粉溶液显色 ,在 570 nm波长下测其吸光度 ,得出小麦、玉米中的碘含量 .测定结果显示 。

After ashing, soaking and acidating the ascertained samples, oxidizing I - into IO - 3 by over bromine water, and reducing IO - 3 into I 2 again by KI, when amylum solution develops, ascertaining its abscrbance with the wave length of 570 nm, the iodine content of wheat and corn will be calculated.