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Project name
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Objectives
- Prepare new solutions for UV-Vis
- Soak prepared furfural film in ethyl acetate
- Run prepared solutions on UV-Vis(run baseline with HPLC grade H2O
- Rerun ion selective electrodes
Furfural Films
General Protocol for rinsing of furfural films:
- Place magnetic stir bar and stemless Büchner funnel top into a 150mL beaker
- Remove film from Teflon dish and place into the beaker
- Add at least 100mL reagent grade ethyl acetate to the beaker(need enough ethyl acetate to completely cover the film)
- Allow the ethyl acetate solution to stir until it appears no color is leaking out from the film
- The furfural film prepared on 10/31/2012 followed the general protocol for rinsing of fufural films.
- The fufural film was spin in EtAc for 2.5hours
Observations:
- Before placement in the ethyl acetate, the film was a dark brown color(uniformly distributed throughout the film) and was very rigid. So rigid slight cracking appeared to be occurring toward the edge of the film
- While in the ethyl acetate, approximately 2 hours into the stirring, slight leakage of furfural from the film. Very slight(perhaps no leakage at all). Some of the ethyl acetate solution was placed in a falcon tube for later analysis.
- After 2.5hrs in the ethyl acetate, film was still dark brown colored and extremely rigid
FTIR
- The general protocol for FTIR was followed
Ran films:
- PVOH(22K)+1mL GA+100% CEC(prepared 10/3/2012)
- PVOH(22K)+1mL GA+50% CEC(prepared 10/4/2012)
- PVOH(22K)+1mL GA+NaMT(prepared 10/3/2012)
- dehydrated crosslinked PVOH(22K)+1mL GA spun 10 min in CuSO4 (prepared 10/13/2012)
- Thin FTIR film(0.1000g PVOH 22K)(prepared 9/21/2012)
- PVOH(22K)+1mL GA (prepared 10/3/2012)
- PVOH(22K)+0.3199 furfural+HCl(after spun with ethyl acetate)
FTIR Images from previous runs:
FTIR Film preparation:
- Crosslinked glutaraldehyde films were patted dry with a paper towel, had a small portion cut off and placed in a 10mL beaker to completely dry. The remaining large portion of the film was reweighed and placed in a beaker filled with deionized H2O for further storage.
Prepared films:
Films
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New mass(g)
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PVOH(22K)+0.5mL GA+100% CEC crosslinked prepared 10/19/2012 |
3.1554
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PVOH(22K)+0.8wt% GA+100%CEC crosslinked prepared 10/3/2012 |
0.3478
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PVOH(22K)+1mL GA+50% CEC crosslinked prepared 10/4/2012 |
0.9595
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PVOH(22K)+0.5mL GA+NaMT crosslinked prepared 10/19/2012 |
2.4191
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UV-vis
- Ran UV-vis on all prepared porphyrin solutions(including solutions with various salt additives) and solutions from crosslinking
Sodium Ion selective electrode
- The general protocol for ion selective electrodes was followed
- The film which was used on 10/31/2012 for ion selective electrode was stored in deionized H2O was tested
Results:
Amount of H2O film stored in(mL)
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49.8
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ISE values(mV) |
-96.1
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Conductivity(μS/cm) |
70.2
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Notes:
- Appears that there is a higher concentration than from 15ppm Cu2+ measured on 2012/10/03
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