尿碘测定常用硫酸铈接触法,但此法只限于测定微量碘,在尿碘高达数百毫克的情况下,只能将尿液稀释数千倍,这就会带来测定误差。为解决尿中高含量碘的测定,我们在硫酸铈接触法的基础上,采用溴氧化法,测定结果令人满意,现将测定方法介绍如下:测定原理:利用硫酸锌和氢氧化钠产生胶体氢氧化锌沉淀,固定尿中有机碘及无机碘,在高温下 Urinary iodine determination commonly used cerium sulfate contact method, but this method is limited to the determination of trace iodine, urinary iodine up to hundreds of milligrams, the urine can only be diluted thousands of times, which will bring the measurement error. In order to solve the determination of high content of iodine in urine, we use the method of bromine oxidation based on the cerium sulfate contact method, and the determination result is satisfactory. The determination method is as follows: Principle of determination: Colloidal hydrogen is produced by using zinc sulfate and sodium hydroxide Zinc oxide precipitation, fixed urinary organic iodine and inorganic iodine, at high temperatures