提出了用煤标准样品校准仪器,脉冲加热样品融熔热导法测定炼钢用增碳剂中氮含量。试验结果表明:① 增碳剂样品须粉碎至粒径为0.180 mm并在空气干燥的条件下制备;② 根据所用氧氮测定仪的工作性能,选取样品的称样量在3.0~7.0 mg之间,并与校准样品的称样量基本保持一致;所称取样品包裹于锡囊中进行分析;③ 由于存在样品基体对测定氮的影响,应使测定样品与校准仪器的标准样品在成分形态方面尽可能保持相似;用煤标准样品对仪器进行校准更为合理;④ 按本方法所得测定值与国家标准方法的测定结果一致,符合标准方法中要求的精密度。

In the determination of nitrogen in carburetants used in steelmaking by thermoconductometry with samplefusion by electroimpulse heating, coal standard samples were used for calibration of Oxygen/Nitrogen Analyzer. It was found that: ① sample of carburetants should be powdered to have size of 0.180 mm in diameter and kept under airdrying; ② in respect to the performance capacity of the analyzer, appropriate amount of sample, as well as the coal standard samples for calibration, were chosen in the range of 3.0-7.0 mg, which was placed into a tin foil capsule for analysis; ③ considering the interference of matrix components, attention to similarity of contents and forms of components between sample and standard sample should be paid, and the coal standard samples were preferred for use in calibration of the analyzer; ④ analytical results of nitrogen in samples of carburetants found by this method were in consistency with those found by the method given in the GB method, and giving values of r and R conforming to the requirements given in the standard.