| 摘要 |
<p>The invention provides a complexant for complexing an anion, particularly, but not exclusively, a pertechnetate anion. The complexant has at least one cation binding site and, when said at least one cation binding site is occupied by a cation, at least one anion binding site. The invention also relates to the extraction of an anion from a liquid medium using the complexant.</p> |
