使用N,N-二辛基二甘醇酰胺酸的综合萃取研究。
Comprehensive extraction study using N,N-dioctyldiglycolamic acid.
作者信息
Shimojo Kojiro, Nakai Ayaka, Okamura Hiroyuki, Saito Takumi, Ohashi Akira, Naganawa Hirochika
机构信息
Division of Chemistry for Nuclear Engineering, Nuclear Science and Engineering Directorate, Japan Atomic Energy Agency (JAEA).
出版信息
Anal Sci. 2014;30(4):513-7. doi: 10.2116/analsci.30.513.
We report on the acid dissociation constants (Ka) of diglycolamic acid-type ligands together with comprehensive data on the extraction performance of N,N-dioctyldiglycolamic acid (DODGAA) for 54 metal ions. The pKa of the diglycolamic acid framework was determined to be 3.54 ± 0.03 in water (0.1 M LiCl, 25°C) by potentiometric titration, indicating that DODGAA is strongly acidic compared with acetic acid. DODGAA can quantitatively transfer various metal ions among the 54 metal ions through a proton-exchange reaction, and provides excellent extraction performance and separation ability for rare-earth metal ions, In(III), Fe(III), Hg(II), and Pb(II) among the 54 metal ions.
我们报告了二甘醇酰胺酸型配体的酸解离常数（Ka），以及关于N,N-二辛基二甘醇酰胺酸（DODGAA）对54种金属离子萃取性能的全面数据。通过电位滴定法测定，在水（0.1 M LiCl，25°C）中，二甘醇酰胺酸骨架的pKa为3.54±0.03，这表明与乙酸相比，DODGAA具有强酸性。DODGAA可以通过质子交换反应在54种金属离子中定量转移各种金属离子，并且对54种金属离子中的稀土金属离子、In(III)、Fe(III)、Hg(II)和Pb(II)具有出色的萃取性能和分离能力。
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