建立了石墨中微量氢的测定方法,本方法较已有的文献方法快速、灵敏。试样于200—250℃下除去附着水分后,通氧气于850℃左右燃烧,生成的水分为干冰冷却的甲醇所吸收。然后,用KFR滴定,以“死停点”法指示终点。本方法的测定下限为2×10~(-3)%,相对标准偏差为6%,用苯甲酸检查方法的误差也为6%。 The determination method of trace hydrogen in graphite was established. The method is faster and more sensitive than the existing literature methods. After removing the attached water at 200-250 ° C, the oxygen is burned at about 850 ° C, and the resulting moisture is absorbed by dry ice-cooled methanol. Then, KFR titration is used to indicate the end point by the “dead stop” method. The lower limit of determination of this method is 2 × 10 -3%, the relative standard deviation of 6%, with benzoic acid test method error is 6%.