| Conditions | Abs. (213.9 nm) | |
| Zn(OAc)2 | ZnCl2 | |
| CM-PVIm (−) | 0.0027 | 0.0030 |
| CM-PVIm (+) | 0.0610 | 0.1667 |
| Zn2+ concentration/mg∙L−1* | 2.0 × 10−4 | 5.6 × 10−4 |
| Chelated Zn2+/mol% per VIm* | 0.51 | 1.28 |