| Metal Ions | Relative Activity (%) | |
|---|---|---|
| Soluble HRP | Immobilized HRP | |
| Control | 100 | 100 |
| NaCl | 116.19 | 118 |
| KCl | 110.5 | 115.62 |
| MgCl2 | 98.45 | 177.78 |
| CaCl2 | 93.22 | 173.20 |
| HgCl2 | - | - |
| PbCl2 | 60 | 75.00 |
| ZnCl2 | 23.77 | 145.56 |
| CdCl2 | 178.12 | 187.25 |
| MnCl2 | 84.65 | 198.54 |
| NiCl2 | 132.11 | 137.5 |
| CuCl2 | - | - |
| CsCl2 | 37.30 | 30.27 |