User:Moira M. Esson/Notebook/CHEM-581/2012/10/03: Difference between revisions
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# Once the measurement is finalized, record the value that appears on the screen. | # Once the measurement is finalized, record the value that appears on the screen. | ||
<br> | <br> | ||
The general protocol for ion selective electrode was used for the collection of the ion selective electrode measurements | The general protocol for ion selective electrode was used for the collection of the ion selective electrode measurements | ||
*Upon testing the pH of our standard solutions, it was observed that the pH was too low(~7.8). | *Upon testing the pH of our standard solutions, it was observed that the pH was too low(~7.8). | ||
*To adjust the pH of the solution, 0.1mL of ionic strength adjuster (4M pH adjuster containing NaOH) was added to each of the 3mL solutions before testing. | *To adjust the pH of the solution, 0.1mL of ionic strength adjuster (4M pH adjuster containing NaOH) was added to each of the 3mL solutions before testing. | ||
*The ionic strength pH adjuster adjusted the pH of the solutions to a new pH value between 8 and 10. | *The ionic strength pH adjuster adjusted the pH of the solutions to a new pH value between 8 and 10. | ||
*The solvent for the solutions was deionized H<sub>2</sub>O unless otherwise specified | |||
<br> | |||
ISE and pH measurements | |||
{| {{table}} | |||
| align="center" style="background:#f0f0f0;"|'''Solution Tested''' | |||
| align="center" style="background:#f0f0f0;"|'''pH of solution with adjustment''' | |||
| align="center" style="background:#f0f0f0;"|'''ISE values with adjustment[mV]''' | |||
|- | |||
| 15ppm CuSO<sub>4</sub>||9.45||-151.1 | |||
|- | |||
| 10ppm CuSO<sub>4</sub>||9.43||-211.7 | |||
|- | |||
| 5ppm CuSO<sub>4</sub>||9.47||-207.9 | |||
|- | |||
| 2ppm CuSO<sub>4</sub>||9.48||-207.5 | |||
|- | |||
| 1ppm CuSO<sub>4</sub>||9.52||-215.5 | |||
|- | |||
| 7.4ppm Cu<sup>2+</sup> 100%CEC 1min filtrate||9.53||-201.2 | |||
|- | |||
| 10ppm Cu<sup>2+</sup> 100%CEC 1min filtrate||8.47||-174.1 | |||
|- | |||
| 7.4ppm Cu<sup>2+</sup> 100%CEC 5min filtrate||9.52||-200.5 | |||
|- | |||
| 10ppm Cu<sup>2+</sup> 100%CEC 5min filtrate||8.45||-172.5 | |||
|- | |||
| 10ppm Cu<sup>2+</sup> 100%CEC 10min filtrate||8.51||-172.3 | |||
|- | |||
| | |||
|} | |||
Revision as of 20:37, 4 October 2012
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Objectives
Crosslinking
Ion Selective ElectrodeGeneral Protocol:
The general protocol for ion selective electrode was used for the collection of the ion selective electrode measurements
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