离子色谱法测定石墨中氟  

IC Determination of Fluoride in Graphite

作　　者：戚佳琳[1,2] 崔鹤[1] 张晓文[1] 王崇霖[1] 王兆锟[1] 李艳秋[1] 徐小茗[1] 

机构地区：[1]山东出入境检验检疫局,青岛266002 [2]中国海洋大学化学化工学院,青岛266003

出　　处：《理化检验（化学分册）》2012年第8期968-969,973,共3页Physical Testing and Chemical Analysis(Part B:Chemical Analysis)

摘　　要：石墨试样于500℃用氢氧化钠高温熔融提取,用热水浸泡洗出熔块以离子色谱法测定氟离子含量。用Dinoex AS15色谱柱,以20 mmol·L^(-1)氢氧化钠溶液为淋洗液等度洗脱,用电导检测器测定。氟离子的质量浓度在0.01～1.0 mg·L^(-1)范围内与其峰面积呈线性关系。方法用于4个产地的14个石墨样品分析,氟的质量分数在3.16×10~2～2.04×10~3mg·kg^(-1)之间。测定值的相对标准偏差(n=11)均低于3.0%。Sample of graphite was fused with NaOH at 500 ℃ and the melt obtained was dissolved with hot water. The content of F in the sample solution was determined by IC. Dinoex AS15 chromatographic column was used as ion exchange column and 20 mmol · L-1 NaOH was used as eluent with conductivity detector for determination. Linear relationship between values of peak area and mass concentration of F was obtained in the range of 0. 01--1.0 mg · L-1. The proposed method has been used in the analysis of 14 samples of graphite from 4 area, giving the contents of F- in the range of 3. 16X10e --2. 04× 103mg · kg-1 with RSD＇s （n=11） less than 3. 0%.

关 键 词：石墨 氟 离子色谱法 

分 类 号：O657.7[理学—分析化学]