信立方质谱培训中心2014年线下培训计划.pdf

Determination of Total Rare Earth Contents of Baotou Rare Earth Concentrates by Inductively Coupled Plasma- Atomic Emission Spectrometry DU Mei1， 2，LIU Xiao- jie1， 2 1． Baotou Research Institute of Rare Earths，Baotou 014030，China; 2． State Engineering Research Center of Rare Earth Metallurgy and Function Materials，Baotou 014030，China Abstract According to the technological process of extracting rare earth in Bao Tou Mine，the content of total rare earth ranges from x － xx． The national standard of the oxalate gravimetric is applied to detecting high content of rare earth，which yields between 20 and 80，but the operation of the separating interference elements is complex． In fact， Inductively Coupled Plasma- Atomic Emission Spectrometry ICP- AES could quickly determine each rare earth element content，and avoid complicated separating steps． However，it was difficult to obtain accurate results by ICP- AES，as a consequence of unfavourable precision for high contents rare earth． The of alkali fusion combined with ICP- AES was applied to overcome problems of complex components and difficult decomposition in acid for rare earth ores from Bao Tou Mine and is reported herein． The sample was melted by sodium hydroxide and sodium peroxide，and leached with deionized water，in order to transfer all kinds of elements into solution as s of ions or hydroxide． The interference of elements in the solution was reduced by filtering aluminum，silicon，phosphorus，and a mass of sodium ion． During determination of rare earth contents with ICP- AES，the instrument stability and matrix effect were adjusted by adding an internal standard with scandium． When rare earth content in the sample was 2，RSD was less than 1． 2． When rare earth content in the sample was between 30 and 50，the was successfully used with RSD ＜0． 7． The recoveries were in the range of 98． 0 － 103． 3． The is simpler than the national standard． Compared with ICP- AES reported in the literatur，the precision of the was significantly improved． Rare earth content in Bao Tou Mine between 2 －50 was quickly and accurately measured using this ． Key words rare earth concentrates; total rare earth content; NaOH- Na2O2fusion; Inductively Coupled Plasma-  Atomic Emission Spectrometry 信立方质谱培训中心 2014 年线下培训计划 课程形式 王光辉、 苏焕华、 李重九、 金幼菊等质谱资深专家现场授课， 传授质谱使用、 检测、 维护经验， 旨在提高分析人员质谱应用 水平。培训主要解决厂商质谱培训中少有涉及的色谱、 质谱基本理论、 最新应用等， 达到 “知其然， 知其所以然” 的目标。 课程特色 ①讲师均为长期从事质谱分析研究的高职人员， 具有丰富理论知识和实践经验。②系统、 全面地讲解气质、 液质联用技 术， 涉及离子源质量分析器原理与结构， 操作技能及常规维护， 也涵盖了定性、 定量在石化、 医药、 食品、 环境等多领域的应用。 ③独有的质谱应用技术水平测试题， 可清楚的对比学习前后的技术水平。④学员可带问题参加学习班， 在学习班和专家即时 讨论交流， 解决实际问题。 课程计划 2014 年 4 月 14 －17 日 GC － MS 气质联用应用技术培训班 2014 年 5 月 20 －22 日 LC － MS 液质联用应用技术培训班 医药 2014 年 7 月 22 －25 日 有机质谱谱图解析培训班 2014 年 10 月 21 －23 日 LC － MS 液质联用应用技术培训班 食品/环境 课程咨询 电话 010 －51654077 －8113 或 8052， 13810253507Email training instrument． com． cn 交流 QQ 群 315532000 备注 信立方培训 。培训时间变动请关注仪器信息网相关资讯或电话咨询。 仪器信息网 供稿 322 第 2 期杜梅， 等 电感耦合等离子体发射光谱法测定包头稀土矿中的稀土总量第 33 卷 ChaoXing