乙醇-乙醇胺体系的非水定碳法因具有很多优点,近几年在钢铁分析中得到普遍应用,但测定过程中的管壁液层吸收问题往往被人们所忽视,从而影响到分析结果的再现与准确。按通常方法操作换取试样时,吸收杯的进气管内有吸收液回升,待系统密封通氧燃烧,进气管内溶液又被压入吸收杯,燃出气体尚未进人吸收杯时,吸收液却发生了色变(麝香草酚酞指示,淡蓝色泽变浅为无色),须再次补滴,吸收液才能回到原来终点色 The non-hydrostatic carbon method of ethanol-ethanolamine system has many advantages because of its many advantages and has been widely used in the analysis of steel in recent years. However, the problem of absorbing the liquid layer in the wall of the tube during the measurement is often neglected, which affects the reproduction of analytical results And accurate. In accordance with the usual method of operation in exchange for the sample, the absorption tube of the absorption tube of the absorption cup rebounded until the system sealed oxygen combustion, the intake pipe solution is pressed into the absorption cup, the gas has not yet entered the absorption cup gas absorption solution But the color change occurred (thymolphthalein indication, pale blue luster is colorless), to make up drops again, the absorption solution can return to the original endpoint color