四碱的醌式结构的氧化产物与未反应的四碱结合,生成一种兰色的不稳定分子络合物。比较兰色,即可测得碘的含量。一、试剂1、0.01%四碱溶液:上海试剂三厂,系统名为 N,N′—四甲基二氨基二苯甲烷。配制:称取0.1克四碱,加入几滴冰醋酸,待全 The oxidation products of the quaternary quinoid structure combine with the unreacted tetrabase to form a blue labile molecular complex. More blue, you can measure the content of iodine. First, the reagents 1,0.01% four alkaline solution: Shanghai Reagent Factory, the system name is N, N’-tetramethyl diaminodiphenyl methane. Preparation: Weigh 0.1 grams of four base, add a few drops of glacial acetic acid, until the whole