利用ICP-MS法测定混合酸分解煤灰中稀土元素  

Measurement of rare earth elements of coal ash decomposed by mixed acid by using ICP-MS method

作　　者：洪伟 杨春茹[2] 高建文[2] 吴舒[1,4] 张凯军 李青山 

机构地区：[1]亚稳材料制备技术与科学国家重点实验室,河北省秦皇岛市066004 [2]秦皇岛出入境检验检疫局煤炭检测技术中心,河北省秦皇岛市066003 [3]中国计量科学研究院,北京市朝阳区100013 [4]中国-阿拉伯化肥有限公司,河北省秦皇岛市066003

出　　处：《中国煤炭》2017年第11期80-83,共4页China Coal

基　　金：国家"十二五"科技支撑计划项目(2011BAD11B05);河北省科技支撑计划项目(16211250);中国-阿拉伯化肥有限公司博士后课题(含稀土元素复合肥料配方及工艺技术的研究;博士后编号169642);国家质量监督检验检疫总局科技计划项目(T2017-HECIQ-0014)

摘　　要：建立了混合酸分解-电感耦合等离子体质谱法测定煤灰中15种稀土元素的分析方法,该方法的检出限为0.007~0.033μg/g,精密度(RSD,n=6)均小于5.0%,使用土壤和岩石标准物质进行验证后,测定结果与标准值相符。运用该方法测定了不同商品煤灰化后稀土元素的含量,结果表明ΣREE为300~1100μg/g,LREE/HREE为3.11~4.80,轻稀土元素占总稀土元素的75.66%~82.61%。另外,伊泰煤灰化后稀土元素总量明显较低,这可能与其低灰分有关。A analysis method to measure the concentration of 15 rare earth elements （REE） in coal ashes by mixed acid de composition and inductively coupled plasma mass spectrometry （ICP-MS） method was established, the detection limit of this method was 0. 007-0. 033 μg/g, the relative standard deviation （RSD, n=6） was less than 5.0%. The accuracy and precision of this method were validated by standard substance of soil and rock and the results were consistent with the standard values. The contents of REE in different coal ashes were measured by this method. The results showed that the contents of REE in different coal ashes were 300-1100 μg/g, the ratio of LREE to HREE was 3. 1144.80 and the proportion of LREE in total REE was 75.66 % - 82.61%. In addition, the content of REE in coal ash of Yitai coal was lower than the others that may had a relationship with the lower ash content.

关 键 词：煤灰 稀土元素 ICP-MS 混合酸 

分 类 号：TQ536[化学工程—煤化学工程]