煤中氟和氯含量的快速测定

Study on Rapid Determination of Fluorine and Chlorine Content in Coal

对称样量、收集级数、淋洗液浓度及流速进行了研究探讨,确立了最佳的高温燃烧水解-离子色谱快速测定煤中氟和氯的分析方法。直接收集预处理煤样的吸收液,以1.8 mmol/L碳酸钠和1.7 mmol/L碳酸氢钠溶液作为淋洗液,进行离子色谱法测定。方法经国家一级煤标准物质分析验证,相对误差<10%,相对标准偏差≤5%。与国标法相比,该方法具有方便快速、使用范围宽、灵敏度高、结果准确可靠的优点,适用于煤中氟和氯的快速检测。

Symmetry sample,collecting series,eluent concentration and flow rate were studied,establish an analytical method for the determination of fluorine and chlorine in coal by ion chromatography with high temperature hydrolysis-ion chromatography. Ion chromatography was performed with 1.8 mmol/L Na2CO3 and 1.7 mmol/L NaHCO3 solution as the eluent,directly collecting the pretreated coal samples of the absorption liquid. This method is verified by the national standard material analysis,the relative error is less than 10%,and the relative standard deviation is less than 5%. Compared with the national standard method,the method has the advantages of convenient and rapid,wide application range and high sensitivity, and the result is accurate and reliable ,and is suitable for the rapid detection of fluorine in coal.