| 离子选择性电极电位法测定钼矿石和钨矿石中氟 |
| |
| 引用本文： | 李清彩,赵庆令,张洪民,荀红梅,杨慎荣.离子选择性电极电位法测定钼矿石和钨矿石中氟[J].理化检验(化学分册),2011(8). |
| |
| 作者姓名： | 李清彩 赵庆令 张洪民 荀红梅 杨慎荣 |
| |
| 作者单位： | 山东省鲁南地质工程勘察院; |
| |
| 基金项目： | 山东省矿产资源补偿费项目(鲁勘2007041)资助 |
| |
| 摘 要： | 采用过氧化钠熔融钼矿石、钨矿石样品,乙二胺四乙酸钠和5-磺基水杨酸混合溶液浸取盐分,将样品溶液静置12h,吸取上层清液,以乙二胺四乙酸钠-硝酸钾组成的混合溶液作为总离子强度缓冲剂,控制溶液pH值为5.1,使用pF-1型氟离子选择电极,以饱和甘汞电极作参比电极测定溶液的平衡电位值。采用标准曲线法测定钼矿石和钨矿石中氟。钼矿石标准物质测定值的相对标准偏差(n=11)为3.36%,经4种国家一级钼矿石、钨矿石标准物质的分析验证,测定结果与标准值吻合。
|
| 关 键 词： | 氟离子选择性电极 电位法 氟 钼矿石和钨矿石 |
Potentiometric Determination of Fluoride in Ores of Molybdenum and Tungsten with Fluoride Ion Selective Electrode |
| |
| LI Qing-cai,ZHAO Qing-ling,ZHANG Hong-min,XUN Hong-mei,YANG Shen-rong.Potentiometric Determination of Fluoride in Ores of Molybdenum and Tungsten with Fluoride Ion Selective Electrode[J].Physical Testing and Chemical Analysis Part B:Chemical Analgsis,2011(8). |
| |
| Authors: | LI Qing-cai ZHAO Qing-ling ZHANG Hong-min XUN Hong-mei YANG Shen-rong |
| |
| Institution: | LI Qing-cai,ZHAO Qing-ling,ZHANG Hong-min,XUN Hong-mei,YANG Shen-rong (South Shandong Geo-engineering and Prospecting Institute,Yanzhou 272100,China) |
| |
| Abstract: | Sample of molybdenum ore or tungsten ore was fused with sodium peroxide,and the melt was extracted with solutions of 5-sulfosalicylic acid and EDTA.After standing for 12 h,an aliquot of the supernatant was taken,and mixed solution of EDTA and KNO_3 was added as ionic strength buffer.Acidity of the solution was adjusted to pH 5.1.The equilibrium potential value of the solution was measured with the pF-1 fluoride ion selective electrode(using SCE as reference electrode).Content of fluoride in sample was found... |
| |
| Keywords: | Fluoride ion selective electrode Potentiometry Fluoride Ores of molybdenum and tungsten |
| 本文献已被 CNKI 等数据库收录！ |
|
