| Determination of Trace Metal Impurities in Cerium Oxide by Fluorination-Assisted ETV-ICP-AES after HPLC Separation |
| |
| 作者姓名： | Ruth Wanjau 胡斌 江祖成 秦永超 何蔓 梁沛 |
| |
| 作者单位： | DepartmentofChemistry,WuhanUniversity,Wuhan430072,China） |
| |
| 基金项目： | 国家自然科学基金，Wuhan Municipal Science & Technology Commission |
| |
| 摘 要： | A new method for the separation and detection of trace metal impurities in cerium oxide (CeO2) using HPLC combined with electrothermal vaporization (ETV)-ICP-AES was developed. This combination links the high separation power of HPLC and high sensitivity of ETV-ICP-AES. The 2-ethylhexyl hydrogen 2-ethylhexylphosphate (P507) resin was used as stationary phase for the separation of metallic impurities in order to eliminate severe spectral interferences of the matrix. The dilute nitric acid was adopted as mobile phase for eluting Cu, Mn, Ni and La. The separation process can be accomplished in about 30 min. After concentrating the eluate by evaporation, the trace impurities were determined by using ETV-ICP-AES with the addition of 6% PTFE slurry as chemical modifier. The proposed method was applied to the analysis of CeO2 with satisfactory recoveries.
|
| 关 键 词： | 二氧化铈 测定 ETV-ICP-AES HPLC 稀土 光度法 |
Determination of Trace Metal Impurities in Cerium Oxide by Fluorination-Assisted ETV-ICP-AES after HPLC Separation |
| |
| Ruth Wanjau.Determination of Trace Metal Impurities in Cerium Oxide by Fluorination-Assisted ETV-ICP-AES after HPLC Separation[J].Journal of Rare Earths,2004,22(2):197-200. |
| |
| Authors: | Ruth Wanjau |
| |
| Abstract: | A new method for the separation and detection of trace metal impurities in cerium oxide(CeO2)using HPLC combined with electrothermal vaporization(ETV)-ICP-AES was developed.This combination links the high separation power of HPLC and high sensitivity of ETV-ICP-AES.The 2-ethylhexyl hydrogen 2-ethylhexylphosphate(P507)resin was used as stationary phase for the separation of metallic impurities in order to eliminate severe spectral interferences of the matrix.The dilute nitric acid was adopted as mobile phase for eluting Cu,Mn,Ni and La.The separation process can be accomplished in about 30 min.After concentrating the eluate by evaporation,the trace impurities were determined by using ETV-ICP-AES with the addition of 6% PTFE slurry as chemical modifier.The proposed method was applied to the analysis of CeO2 with satisfactory recoveries. |
| |
| Keywords: | chemical analysis fluorination-electrothermal vaporization HPLC P507 resin cerium oxide rare earths |
| 本文献已被 维普 万方数据 等数据库收录！ |
