Table 4 The procedures of column chemistry for the separation of Sm, Gd, Er and Yb
Procedure | Eluent | Volume (mL) | Remarks |
|---|---|---|---|
Cleaning | 6.0 M HCl | 2.5 | |
Conditioning | Milli-Q water | 2.5 | |
0.25 M HCl | 2.5 | ||
Load sample | 1 drop | ||
Waste | 0.25 M HCl | 8.0 | Elution of La, Ce, Pr and Nd |
Waste | 0.31 M HCl | 1.0 | |
Collect Sm | 0.31 M HCl | 8.0 | |
Waste | 0.31 M HCl | 4.0 | Elution of Eu |
Collect Gd | 0.31 M HCl | 6.0 | |
Collect Gd | 0.5 M HCl | 4.0 | |
Waste | 0.5 M HCl | 2.0 | |
Waste | 1.5 M HCl | 4.0 | Elution of Tb, Dy and Ho |
Collect Er | 1.5 M HCl | 2.0 | |
Collect Er | 2.0 M HCl | 3.0 | |
Waste | 2.0 M HCl | 1.0 | |
Waste | 2.8 M HCl | 3.5 | Elution of Tm |
Collect Yb | 2.8 M HCl | 6.0 |