高频感应燃烧-红外吸收法测定复合碳硅锰铁合金中碳和硫

来源期刊：冶金分析2010年第6期

论文作者：李兰群 尹艳清

文章页码：62 - 65

关键词：复合碳硅锰铁合金； 助熔剂； 高频感应燃烧-红外吸收法

Key words：complex carbon ferro-silico-manganese alloy； flux； high frequency-infrared absorption method

摘    要：介绍了利用红外碳硫测定仪测定新型铁合金材料复合碳硅锰铁合金中碳和硫含量的方法。对助熔剂的种类、助溶剂的用量、试样称样量和校正标样作了较详细的试验研究,获得了最佳的分析条件。在没有复合碳硅锰铁合金标准样品情况下,实验选用含量接近的铁合金和生铁标样分别校准碳和硫的校准曲线。通过该方法对试样测定的精密度、准确度以及回收率的实验,证明该方法用于复合碳硅锰铁中碳和硫的分析切实可行。实际样品中碳、硫测定结果的相对标准偏差分别小于1%和3%,加标回收率分别在97%～103%和97%～103%之间。

Abstract: A rapid and sensitive method was proposed to determine carbon and sulfur content in a new complex carbon ferro-silico-manganese alloy by infrared carbon-sulfur detector in this paper. The analysis conditions including the selection and the dosage of flux,the sampling weight and the certified reference materials for calibration were investigated in detail and optimized. On account of no corresponding certified reference materials, the certified reference materials of iron alloy and iron with similar content were chosen to calibrate the calibration curve of carbon and sulfur. The results for precision, accuracy and recovery test indicated that this method was feasiable to determine carbon and sufur in complex carbon ferro-silico-manganese alloy. The linear range for carbon was 4.5%-6.5%, and that for sulfur 0.05%-0.20%. The method has been applied to the determination of real samples with the relative standard deviation smaller than 1% for carbon and 3% for sulfur.