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本文介绍一种测定金属中氮含量的新型仪器。用悬浮熔融代替石墨坩埚加热方法。利用悬浮熔融技术来抽取金属中的氮,具有温度高、加热时间短、电磁搅拌强烈、熔体流动性良好和脱气表面大、氨空白值低等优点,特别适用于稀有和难熔金属中氨的测定。悬浮熔融气相色谱定氨仪由气体抽取、氮的分离和检测、数据处理和分析结果显示等三部分组成。数字显示灵敏度为1ppmN,一次测定需6min。 该仪器对硅钢、不锈钢、耐蚀钢,钒铁、铌、钽、钛、钛合金、钼、钼合金、钨合金和锆合金等试样中氮的测定结果同凯氏法的分析值或标准值完全一致。
This article describes a new instrument for determining nitrogen in metals. Float melting instead of graphite crucible heating method. The use of suspension melting technology to extract the nitrogen in the metal, with the advantages of high temperature, short heating time, strong electromagnetic stirring, good melt flow and degassing surface, ammonia blank value is low, especially for rare and refractory metals Determination of ammonia. Suspended melting gas chromatography ammonia determination by the gas extraction, nitrogen separation and detection, data processing and analysis results show that three parts. Digital display sensitivity of 1ppmN, a measurement to be 6min. The instrument for silicon steel, stainless steel, corrosion-resistant steel, vanadium iron, niobium, tantalum, titanium, titanium, molybdenum, molybdenum alloy, tungsten alloy and zirconium alloy and other samples of nitrogen determination results with Kjeldahl analysis value or standard The value is exactly the same.