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Project name
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Objectives
- Crosslink porphyrin films
- Run AA using film adsorption
- Prepare next highest porphyrin concentration solution. Then add salts to these higher porphyrin solutions
Crosslinking
- The general protocol for porphyrin film crosslinking described on 2012/09/14 was followed for the films listed below
Films Crosslinked:
- PVOH(22K) 1.0073g+1.0mL GA+1mL porphyrin
- PVOH(22K) 1.05225g+1.0mL GA+1mL porphyrin
Crosslinking information
Films
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Amount of fixant solution used to crosslink(mL)
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Amount fixant solution kept in vial(mL)
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Amount of 1% aqueous HCl solution used to crosslink(mL
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Amount HCl solution saved in vial(mL)
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Amount of 0.2M sodium bicarbonate used(mL)
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Amount sodium bicarbonate solution saved(mL)
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Mass of film after crosslinking(g)
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PVOH(22K) 1.0073g+1.0mL GA+1mL porphyrin |
99.95 |
13 |
100 |
14 |
100 |
12 |
1.4974
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PVOH(22K) 1.05225g+1.0mL GA+1mL porphyrin |
101 |
12 |
98 |
13 |
99.8 |
12 |
1.9251
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- For the films listed below, the films were placed in a 6M NaCl solution at 70°C for ~1.5 hours
Crosslinked Films:
- PVOH(22K) 1.02114g+0.5mL GA+1mL porphyrin+HCl
- PVOH(22K) 1.0067g+1mL GA+1mL porphyrin+HCl
Crosslinking information:
Films crosslinked
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Amount of NaCl added(g)
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Amount 6M NaCl solution used(mL)
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Amount NaCl solution saved(mL)
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Mass of film after crosslinking(g)
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PVOH(22K) 1.02114g+0.5mL GA+1mL porphyrin+HCl |
0.3576 |
100 |
12 |
1.7781
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PVOH(22K) 1.0067g+1mL GA+1mL porphyrin+HCl |
0.363 |
99 |
12 |
1.5672
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Observations for crosslinking films
- PVOH(22K) 1.02114g+0.5mL GA+1mL porphyrin+HCl was shrunken, shriveled and was green in color before crosslinking
- PVOH(22K) 1.0067g+1mL GA+1mL porphyrin+HCl shrunk, looked shriveled and was green in color before crosslinking
- PVOH(22K) 1.0073g+1.0mL GA+1mL porphyrin was flat, relatively shiny and pink in color before crosslinking
- PVOH(22K) 1.05225g+1.0mL GA+1mL porphyrin was flat, shiny and pink in color before crosslinking
- When added film to fixant solution both beakers of solution had some color leak out. Color of both beakers were yellowish/greenish. Film with 1mL GA not as colored. Film with 0.5mL GA seems to be a more vibrant color(leaking more)
- NaCl solution with film with 0.5mL GA had very slight leaking(slight discoloration of solution very light green). Coloration of solution was occurring very gradually
- Both films after fixant solution were a vibrant green color(like jolly rancher green). Film with 1.0mL GA was a darker/ more vibrant green
- Films placed in 1% aqueous HCl soltn. both started to have color leak out
- 1.0mL GA+HCl film when placed in the 6M NaCl solution leaked very minimally(solution looks very faintly green). Much less in comparison to 0.5mL GA.
- 0.5mL GA+HCl film after 1hr. and 15min. heated , remained bright green color. Stored in H2O. After adding H2O, film turned into a pink color(darker pink on edges)
- Addition of both films to sodium bicarbonate caused all porphyrin to leak out(films no longer colored. completely clear.)
- Film 1mLGA+HCl remained dark green and more stiff than other film. Turned pink after addition to deionized H2O
Please refer to User:Karlena_L._Brown/Notebook/CHEM-581/2012/10/26 and User:Melissa_Novy/Notebook/CHEM-581/2012/10/26 for calculations relating to preparation of higher concentration of porphyrin solutions and salt.
AA
- Ran AA following the general protocol for atomic absorption. Ran on solutions collected from film adsorption completed 2012/10/17
'
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Concentration [ppm]
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Abs. [ ]
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BG
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'
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0.01 |
-0.00600 |
0.00200 |
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0.05 |
-0.01160 |
0.00540 |
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1 |
-0.00920 |
0.00150 |
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2 |
0.11710 |
0.00470 |
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3 |
0.20330 |
0.00330 |
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Given Conc. [ppm] |
Abs. [ ] |
BG |
Conc. [ppm]
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1 min NaMT-CuSO4 |
7.4 |
0.37690 |
0.00430 |
5.63990
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10 |
0.47600 |
0.00620 |
7.01910
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5 min NaMT-CuSO4 |
7.4 |
0.38080 |
0.00350 |
5.69420
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10 |
0.48150 |
0.00600 |
7.09560
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10 min NaMT-CuSO4 |
7.4 |
0.29540 |
0.00370 |
4.50580
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10 |
0.37640 |
0.00480 |
5.63300
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1 min 100%CEC NaMT-CuSO4 |
7.4 |
0.48030 |
0.00680 |
7.07890
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10 |
0.61880 |
0.00950 |
9.00630
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5 min 100%CEC NaMT-CuSO4 |
7.4 |
0.46120 |
0.00640 |
6.81310
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10 |
0.62080 |
0.00790 |
9.03420
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10 min 100%CEC NaMT-CuSO4 |
7.4 |
0.43300 |
0.00400 |
6.42070
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10 |
0.62960 |
0.00480 |
9.15660
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1 min 50%CEC NaMT-CuSO4 |
7.4 |
0.47470 |
0.00530 |
7.00100
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10 |
0.62050 |
0.00490 |
9.03000
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5 min 50%CEC NaMT-CuSO4 |
7.4 |
0.46110 |
0.00310 |
6.81170
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10 |
0.60940 |
0.00580 |
8.87550
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10 min 50%CEC NaMT-CuSO4 |
7.4 |
0.46800 |
0.00390 |
6.90770
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10 |
0.59620 |
0.00440 |
8.69180
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