Research Article
Determination of Thallium(I) by Hybrid Mesoporous Silica (SBA-15) Modified Electrode
Table 2
Change in slope and detection limit with time for CPE8.
| | Time (months) | Slope (mV/dec. of activity) | LOD |
| | 1 | 42.4 ± 1.0 | 6.0 × 10−9 M | | 2 | 42.4 ± 1.0 | 6.0 × 10−9 M | | 3 | 42.4 ± 1.0 | 6.0 × 10−9 M | | 4 | 42.4 ± 1.0 | 6.0 × 10−9 M | | 5 | 42.4 ± 1.0 | 6.0 × 10−9 M | | 6 | 42.4 ± 1.0 | 6.0 × 10−9 M | | 7 | 42.4 ± 1.0 | 6.0 × 10−9 M | | 8 | 41.3 ± 1.0 | 6.0 × 10−9 M | | 9 | 40.1 ± 1.0 | 8.0 × 10−9 M | | 10 | 39.3 ± 1.0 | 8.6 × 10−9 M | | 11 | 36.2 ± 1.0 | 1.2 × 10−8 M | | 12 | 33.8 ± 1.0 | 6.7 × 10−8 M | | 13 | 32.1 ± 1.0 | 1.5 × 10−7 M |
|
|
