Research Article
Determination of Thallium(I) by Hybrid Mesoporous Silica (SBA-15) Modified Electrode
Table 1
Effect of electrode components on response characters of modified carbon paste electrode.
| | | Composition, % (w/w) | Slope (mV/decay) | Linear range (M) | LOD (M) | Response time (s) | | TMPA-SBA-15 | Graphite powder | Paraffin oil |
| | CPE1 | 0 | 75 | 25 | 10.6 ± 2.5 | — | — | — | | CPE2 | 2 | 75 | 23 | 21.6 ± 1.4 | | | 25 | | CPE3 | 3 | 75 | 22 | 24.4 ± 1.2 | | | 22 | | CPE4 | 5 | 75 | 20 | 26.3 ± 1.2 | | | 18 | | CPE5 | 7 | 75 | 18 | 28.4 ± 1.1 | | | 15 | | CPE6 | 8 | 75 | 17 | 31.4 ± 1.1 | | | 12 | | CPE7 | 9 | 75 | 26 | 35.6 ± 1.1 | | | 10 | | CPE8 | 10 | 75 | 15 | 42.4 ± 1.0 | | | 8 | | CPE9 | 10 | 74 | 16 | 42.4 ± 1.0 | | | 8 | | CPE10 | 11 | 73 | 16 | 40.8 ± 1.0 | | | 8 | | CPE11 | 12 | 69 | 19 | 40.2 ± 1.0 | | | 8 | | CPE12 | 15 | 65 | 20 | 38.6 ± 1.0 | | | 8 |
|
|
Mean value ± standard deviation (three measurements).
|
