煤中氟测定方法的补充条件试验研究  

Experimental study on supplementary conditions for determination method of fluorine in coal

作　　者：龚婉莉 张亢 王秋湘[1,2,3] GONG Wan-li;ZHANG Kang;WANG Qiu-xiang(China National Coal Quality Supervision and Testing Center,Beijing 100013,China;Test Branch of China Coal Research Institute Corporation Ltd.,Beijing 100013,China;State Key Laboratory of Coal Mining and Clean Utilization,Beijing 100013,China)

机构地区：[1]国家煤炭质量监督检验中心,北京100013 [2]煤炭科学技术研究院有限公司检测分院,北京100013 [3]煤炭资源高效开采与洁净利用国家重点实验室,北京100013

出　　处：《煤质技术》2019年第3期39-42,共4页Coal Quality Technology

基　　金：煤炭科学技术研究院有限公司基础研究基金资助项目(2017JC03)

摘　　要：通过对煤中氟测定方法的试验空白主要来源、石英砂预处理方法及空白试验次数等进行补充条件试验研究,确定了空白试验的测定方法,同时讨论了电位测定过程中搅拌转速对煤中氟测定结果的影响。煤中氟标准物质试验结果表明,煤中氟测定值均在标准值的不确定度范围内,精密度良好,其相对标准偏差为0.83%~1.45%(n=10),加标回收率为99.75%~108.50%,检出限为0.374μg/g。The supplementary condition experimental study was done for main source of test blank of fluorine determination method in coal,the pretreatment method of quartz sand and the number of blank test,the test method for blank test was determined,meanwhile,the influence of agitation speed on the test results in potentiometric process was discussed.The test results of fluorine in coal standard material showed that,the determination results range are all in the uncertainty range of standard value,the precision is good,the relative standard deviation is 0.83%~1.45%(n=10),the spike recovery is in the range of 99.75%~108.50%,the detection limit is 0.374μg/g.

关 键 词：高温燃烧水解-氟离子选择电极法 煤中氟 空白试验 检出限 石英砂 不确定度 加标回收率 

分 类 号：TQ533.9[化学工程—煤化学工程] T-652.1[一般工业技术]