针对目前最常用的液-液萃取、ICP-MS测定法检测表生水体中微量稀土元素方法,研究了不同pH值条件下,酸性膦(65%HDEHP和35%H2MEHP)自表生水体中萃取稀土元素(REEs)的回收率.结果表明,在pH1～4的范围内,不同性质的水体(湖泊、河流、地下水)有不同的REEs回收率.其中湖水在pH 1.8～3.7有90%以上的回收率,最高回收率为93.64%;河水在pH 2.1～3.5范围内有90%以上的回收率,最高回收率为95.52%;地下水仅在pH 1.3～1.5时回收率超过90%,最高回收率为97.61%.说明在萃取不同表生水体中稀土元素时,需要调到特定的pH值才能得到最好的萃取效果.
参考文献
| [1] | Elderfield H R;Greaves M J .The rare earth elements in seawater[J].NATURE,1982,296:214-219. |
| [2] | Elderfield H R;Upstill-Goddard;Sholkovitz E R .The rare earth elements in rivers,estuaries,and coastal seas and their significance to the composition of ocean waters[J].Geochimica et Cosmochimica Acta,1990,54:971-991. |
| [3] | Goldstein S J;Jacobsen S B .Rare earth elements in river waters[J].Earth and Planetary Science Letters,1988,89:35-47. |
| [4] | 尹明;李冰.电感耦合等离子体质谱手册[M].北京:原子能出版社,1997:186-195. |
| [5] | Shabani M B;Akagi T;Shimizu H et al.Determination of trace lanthanides and yttrium in seawater by inductively coupled plasma mass spectrometry after preconcentration with solvent extraction and backextraction[J].Analytical Chemistry,1990,62:2709-2714. |
| [6] | Shabani M B;Akagi T;Masada A .Preconcentration of trace rare-earth elements in seawater by complexation with bis(2-ethylhexyl) hydrogen phosphate and2-ethylhexyl dihydrogen phosphate adsorbed on a C18cartridge and determination by inductively coupled plasma mass spectrometry[J].Analytical Chemistry,1992,64:737-743. |
| [7] | G. V. Kostikova;N. A. Danilov;Yu. S. Krylov;G. V. Korpusov;E. V. Sal'nikova .Extraction of Scandium from Various Media with Triisoamyl Phosphate: 1. Extraction of Sc and Impurity Metals from Aqueous Nitric Acid Solutions[J].Radiochemistry,2005(2):181-185. |
| [8] | O. V. Shmidt;B. Ya. Zilberman;Yu. S. Fedorov;Yu. V. Palenik;R. G. Glekov;S. Yu. Sukhareva .Effect of TBP on Extraction of REE and TPE with 4d Element Salts of Dibutylphosphoric Acid[J].Radiochemistry,2003(6):591-595. |
| [9] | 张海政,阎欣,王秀丽.萃取色谱富集-等离子体质谱测定海水中的超痕量稀土[J].岩矿测试,1997(03):201. |
| [10] | Jugdeep K. Aggarwal;Mohammad B. Shabani;Martin R. Palmer;K. Vala Ragnarsdottir .Determination of the Rare Earth Elements in Aqueous Samples at Sub-ppt Levels by Inductively Coupled Plasma Mass Spectrometry and Flow Injection ICPMS[J].Analytical chemistry,1996(24):4418-4423. |
| [11] | 江祖成;蔡汝秀;张华山.稀土元素分析化学[M].北京:科学出版社,2000 |
| [12] | 毛家骏;祝大昌;钱君贤.无机痕量分析中的分离和预浓集方法[M].上海:复旦大学出版社,1985:83-157. |
| [13] | 刘丛强,吴佳红,于文辉.氢氧化铁胶体/水界面作用与地表水中稀土元素的分异--pH控制机理的实验研究[J].中国科学D辑,2001(10):873-880. |
| [14] | Johannesson KH;Tang JW;Daniels JM;Bounds WJ;Burdige DJ .Rare earth element concentrations and speciation in organic-rich blackwaters of the Great Dismal Swamp, Virginia, USA[J].Chemical geology,2004(3-4):271-294. |
| [15] | Luo YR.;Byrne RH. .Carbonate complexation of yttrium and the rare earth elements in natural waters[J].Geochimica et Cosmochimica Acta: Journal of the Geochemical Society and the Meteoritical Society,2004(4):691-699. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%