离子色谱法测定煤中总硫  

Determination of total sulfur in coal by ion chromatography

作　　者：李淑敏[1] 应波[1] 岳银铃[1] 景宽[2] 

机构地区：[1]中国疾病预防控制中心环境与健康相关产品安全所,北京100050 [2]北京工业大学

出　　处：《卫生研究》2006年第4期492-494,共3页Journal of Hygiene Research

基　　金："十五"国家科技攻关项目(No.2004BA704B03)

摘　　要：目的 建立简便、快速煤中总硫的测定方法。方法 以过氧化氢为吸收液，将热解气中的硫氧化物转化为SO4^2-，选用抑制型电导检测器，DionexAS12A阴离子分析柱，以碳酸盐作为淋洗液，进样体积50出。通过测定吸收液中SO4^2-的浓度，计算出煤中总硫的含量。结果 本方法与国家标准方法GB／T214-1996高温燃烧中和法进行了比较，其相对标准偏差小于2％。当硫酸根含量在0～15μg／ml范围时，具有良好的线性关系（r=0.9998），对国家煤标准参考物质GBW11104c和GBW1110d进行了测定，RSD分别为1．92％和0．47％。结论 离子色谱法测定煤中总硫具有方便，准确，快捷的优点，可用于煤炭中总硫的测定。Objective To develop a method for determination of total sulfur in coal by ion chromatography. Methods To pretreat the coal by high-temperature combustion with oxygen-flow in tube furnace, and the sulfur with any from in coal was oxidated and converted into oxid of sulfur, which became sulfate after oxidated by H2O2 absorption solution. The separation of sulfate was achieved on DionexAS12A anion exchange column with a carbonate eluent, and the detection is performed by the suppressed conductivity detector with the injection volume of 50μl. The total sulfur in coals were obtained from the determined results. Results The method had been compared with the National Standard Method ＂High- Temperature——Combustion ＂Neutralization Method for Determination of Total Sulfur in Coal （ GB/T214-1996）＂, and the RSD of the method was less than 2% . This method had good relativity of the linearity （ r = 0.9998） at the range of 0 ～ 15μg/ml for sulfate. Two kinds of national certified reference materials （ GBW11104c and GBW11110d） were determined, and the RSD were 1.92% and 0.47% respectively. Conclusion Ion chromatography for determination of total sulfur in coal has simple operation, high accuracy, and fast analysis, and can be applied in determination of total sulfur in coal.

关 键 词：煤中总硫 离子色谱法 二氧化硫 

分 类 号：X511[环境科学与工程—环境工程] X830.2