标准曲线法测定煤中自由基含量  

Quantitative Determination of Free Radical Content in Coal by Standard Curve Method

作　　者：郑榕萍[1] 潘铁英[1] 史新梅[1] 周丽芳[1] 刘瑞民[2] 张德祥[2] 高晋生[2] 

机构地区：[1]华东理工大学分析测试中心,上海200237 [2]华东理工大学资源与与环境工程学院,上海200237

出　　处：《波谱学杂志》2011年第2期259-264,共6页Chinese Journal of Magnetic Resonance

基　　金：国家自然科学基金资助项目(20576039);国家高技术研究发展计划资助项目("863"计划)(2006AA05Z314);国家重点基础研究发展计划资助项目(2011CB201304)

摘　　要：自由基在煤变质过程、煤自燃反应及煤热解和液化中发挥着重要作用,准确测量煤中自由基总量对于研究上述煤的反应机理具有一定的理论意义.由于单点法测量煤中自由基含量的准确度及精确度不够,该文通过考察ESR测定自由基含量的稳定性和重复性,尝试建立了标准曲线方法测定煤中的自由基含量,得到了满意的结果.稳定性实验的相对标准偏差（RSD）〈4%,重复性实验的相对准偏差（RSD）〈3%,自由基含量在本实验范围（6.12×1015~1.47×1017）内线性关系良好,相关系数〉0.99.实验结果表明,该方法对煤中自由基含量测定有很好的精密度和准确性.Free radicals play important roles in the metamorphic process,spontaneous combustion,pyrolysis and liquefacton of coal.Accurate quantitative determination of the free radical content in coal is important in studying the mechanism of coal pyrolysis and liquefaction.In this work,the stability and repeatability of quantitative measurement of total free radicals in coal by ESR method were investigated.With a standard curve method,the RSD of both stability and repeatability were less than 4%.The linearity of the method was in the range of 6.12×1015~1.47×1017,and correlation coefficient above 0.99.

关 键 词：电子顺磁共振(ESR) 标准曲线法 自由基 煤 

分 类 号：O482.53[理学—固体物理]