User:Melissa Novy/Notebook/CHEM-581/2012/10/03

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Objectives

  • Crosslink Na-MT films.
  • Adjust the pH of CuSO4 solutions made on 2012/09/28, then take ISE measurements.

CuSO4 Standard and Filtrate Solutions

  • Please refer to the ISE protocol on 2012/09/28 for how ISE measurements were taken.
    • 3 mL of the solutions were added to 0.1 mL of ionic strength adjuster (4 M solution containing NaOH) to adjust the pH to a value between 8 and 10.
    • The solutions were allowed to equilibrate with the electrode for 2 min.


CuSO4 Standard Solutions

Concentration [ppm] pH ISE [mV]
1 9.52 -215.5
2 9.48 -207.5
5 9.47 -207.9
10 9.43 -211.7
15 9.45 -151.1


100% CEC (Na-MT)-CuSO4 Filtrate

Cu+2 Concentration [ppm] Time [min] pH ISE [mV]
7.4 1 9.53 -201.2
10 1 8.47 -174.1
7.4 5 9.52 -200.5
10 5 8.45 -172.5
7.4 10 8.51 -172.3
10 10 9.53 -199


50% CEC (Na-MT)-CuSO4 Filtrate