一、前言测定硒的方法很多,有经典的重量法,容量法和极谱法、分光光度法、X光分析法,气体色谱法及中子活化法。经典的重量法,操作麻烦,需要时间较长,并且要有特殊的装置,精密度也较低。后来由Deshmukh等人提出碘量法,到1958年Cooch等人提出了高锰酸盐滴定法,Schrenk等又发展了这个方法,并得到了广泛的应用。Hoste等人提出用3,3’-二氨基联苯胺 First, the preface Determination of selenium many ways, there are classical gravimetric method, volumetric method and polarography, spectrophotometry, X-ray analysis, gas chromatography and neutron activation method. Classic gravimetric method, the operation is troublesome, takes a long time, and must have the special device, the precision is also lower. Later Deshmukh et al. Proposed the iodometric method. By 1958, Cooch et al. Proposed the permanganate titration method. Schrenk et al. Developed this method and got a wide range of applications. Hoste et al. Propose using 3,3’-diaminobenzidine