PVC Based Selective Sensors for Ni2+ Ions Using Carboxylated and Methylated Porphine
Abstract
:Introduction
Experimental
Reagents
Preparation of membranes
Potential measurements
Electrode/ Membrane No. | %(w/w) of various components | Working concn. range, M | Slope, mV/decade of activity | Response time, sec | ||||||
---|---|---|---|---|---|---|---|---|---|---|
TBAP | DBP | DOP | DBBP | CN | NaTPB | PVC | ||||
1 | 10 | - | - | - | - | 5 | 85 | 5.5 x 10-5 – 1.0 x 10-1 | 26.0 | 60 |
2 | 10 | 30 | - | - | - | 5 | 55 | 2.0 x 10-5 – 1.0 x 10-1 | 28.5 | 15 |
3 | 10 | - | 30 | - | - | 5 | 55 | 5.5 x 10-5 – 1.0 x 10-1 | 34.0 | 20 |
4 | 10 | - | - | 30 | - | 5 | 55 | 2.0 x 10-6 – 1.0 x 10-1 | 29.6 | 15 |
5 | 10 | - | - | - | 30 | 5 | 55 | 5.6 x 10-5 – 1.0 x 10-1 | 35.3 | 10 |
Electrode/ Membrane No. | %(w/w) of various components | Working concen. Range, M | Slope, mV/decade of activity | Response time, sec | ||||||
---|---|---|---|---|---|---|---|---|---|---|
OMP | DBP | DOP | DBBP | CN | NaTPB | PVC | ||||
6 | 10 | - | - | - | - | 5 | 85 | 1.0 x 10-4 – 1.0 x 10-1 | 32.4 | 60 |
7 | 10 | 30 | - | - | - | 5 | 55 | 5.0 x 10-5 – 1.0 x 10-1 | 37.7 | 20 |
8 | 10 | - | 30 | - | - | 5 | 55 | 3.6 x 10-5 – 1.0 x 10-1 | 38.8 | 15 |
9 | 10 | - | - | 30 | - | 5 | 55 | 5.6 x 10-5 – 1.0 x 10-1 | 30.1 | 15 |
10 | 10 | - | - | - | 30 | 5 | 55 | 1.0 x 10-5 – 1.0 x 10-1 | 29.0 | 10 |
Results and Discussion
Working concentration range
Response and lifetime
pH and non-aqueous effect
Potentiometric selectivity
Interfering ion, B | Selectivity coefficients, | |
---|---|---|
Electrode No. 4 | Electrode No. 10 | |
NH4+ | 1.4 x 10-2 | 2.0 x 10-2 |
Na+ | 9.0 x 10-2 | 8.2 x 10-2 |
K+ | 5.3 x 10-2 | 2.0 x 10-2 |
Tl+ | 3.2 x 10-2 | 1.9 x 10-2 |
Cs+ | 4.7 x 10-2 | 1.4 x 10-2 |
Cu2+ | 1.2 x 10-3 | 1.8 x 10-3 |
Ca2+ | 1.4 x 10-3 | 1.2 x 10-3 |
Sr2+ | 1.9 x 10-3 | 2.5 x 10-3 |
Ba2+ | 2.0 x 10-3 | 2.0 x 10-3 |
Mg2+ | 1.4 x 10-3 | 2.8 x 10-3 |
Co2+ | 2.3 x 10-1 | 4.8 x 10-1 |
Cd2+ | 2.6 x 10-3 | 2.4 x 10-3 |
Zn2+ | 2.2 x 10-3 | 2.6 x 10-3 |
Hg2+ | 1.4 x 10-3 | 1.4 x 10-3 |
Pb2+ | 1.4 x 10-3 | 1.6 x 10-3 |
Fe3+ | 1.8 x 10-3 | 1.4 x 10-3 |
Al3+ | 2.0 x 10-3 | 1.9 x 10-3 |
Ce3+ | 2.8 x 10-3 | 1.8 x 10-3 |
Analytical applications
Estimation of Ni2+ in effluents
Samples | PH | Ni2+ as determined byAAS, mg l-1 | Ni2+ as determined by sensor 4, mg l-1 | |
---|---|---|---|---|
Found | after Adjustment | |||
1 | 6.80 | 3.70 | 44.0 | 47.0 |
2 | 6.65. | 3.80 | 43.5 | 47.0 |
3 | 6.70 | 3.65 | 43.0 | 46.0 |
4 | 6.90 | 3.75 | 42.0 | 45.0 |
Potentiometric titration
Conclusion
Acknowledgements
References
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Singh, L.P.; Bhatnagar, J.M. PVC Based Selective Sensors for Ni2+ Ions Using Carboxylated and Methylated Porphine. Sensors 2003, 3, 393-403. https://doi.org/10.3390/s30900393
Singh LP, Bhatnagar JM. PVC Based Selective Sensors for Ni2+ Ions Using Carboxylated and Methylated Porphine. Sensors. 2003; 3(9):393-403. https://doi.org/10.3390/s30900393
Chicago/Turabian StyleSingh, L. P., and J. M. Bhatnagar. 2003. "PVC Based Selective Sensors for Ni2+ Ions Using Carboxylated and Methylated Porphine" Sensors 3, no. 9: 393-403. https://doi.org/10.3390/s30900393