一、前言分光光度法是目前应用较广泛的分析方法之一。某些物质在特定波长下具有最大的吸收特性,可用分光光度法来鉴别该物质。同时,根据该物质的摩尔吸光系数ε,按C=A/εL 公式,可求出该物质的浓度 C。苯胺在320～240nm 波长内进行扫描,可以测定其吸光值,苯胺的特征吸收峰波长为280nm。分光光度法测定无水肼中苯胺,快速简便,灵敏度高,易于掌握。方法的准确度及精密度尚满意。二、实验部分(一)试剂和仪器苯胺,A R移液管,1毫升和10毫升各1注射器,50或100微升容量瓶,25毫升和100毫升各1岛津双光束分光光度计 UV-200,带有 First, the preface Spectrophotometry is one of the more widely used analytical methods. Some substances have the greatest absorption properties at a particular wavelength, and spectrophotometry can be used to identify the substance. At the same time, according to the substance’s molar extinction coefficient ε, according to C = A / εL formula, the concentration of the substance C can be obtained. The aniline is scanned in the wavelength of 320 ~ 240nm, the absorbance can be measured, and the characteristic absorption peak wavelength of aniline is 280nm. Spectrophotometric determination of aniline in anhydrous hydrazine, fast and easy, high sensitivity, easy to master. The accuracy and precision of the method is still satisfactory. II. Experimental Section (a) Reagents and Instruments Aniline, AR Pipette, 1 ml and 10 ml each 1 syringe, 50 or 100 μl volumetric flask, 25 ml and 100 ml each 1 Shimadzu Dual Beam Spectrophotometer UV- 200, with