User:Moira M. Esson/Notebook/CHEM-581/2012/10/19

From OpenWetWare

(Difference between revisions)
Jump to: navigation, search
(Crosslinking)
(Crosslinking)
Line 89: Line 89:
'''Crosslinking notes''':
'''Crosslinking notes''':
*While porphyrin film was in the H<sub>2</sub>SO<sub>4</sub> fixant solution, the film changed color from pink to yellow. Some yellow color leaked into the solution(uniformly). A good portion of color leaked out of during this step.
*While porphyrin film was in the H<sub>2</sub>SO<sub>4</sub> fixant solution, the film changed color from pink to yellow. Some yellow color leaked into the solution(uniformly). A good portion of color leaked out of during this step.
-
*While taking out the film from the 1% aqueous HCl solution, the film did not have a frosted color to it(as other films not containing porphyrin had at this step). Instead, the film turned from yellowish to a relatively greenish tint. A good portion of color leaked out of the film during this
+
*While taking out the film from the 1% aqueous HCl solution, the film did not have a frosted color to it(as other films not containing porphyrin had at this step). Instead, the film turned from yellowish to a relatively greenish tint. A good portion of color leaked out of the film during this step
 +
*When adding the film to the sodium bicarbonate solution, the film turned back into a light pinkish color. Color continued to leak out of film during this step. After 15 minutes the film still retained a faint pink color
 +
*From the amount of leakage, it appears as if 0.5mL glutaraldehyde per 1g PVOH in a large Teflon dish is not sufficient. For next film preparation, 1mL of glutaraldehyde will be used
 +
*approximately 12mL of each solution was saved after crosslinking
 +
 

Revision as of 10:41, 26 October 2012

Project name Main project page
Previous entry      Next entry

Objectives

  1. Finish running AA
  2. Crosslink porphyrin films
  3. Reprepare Fe3O4 filtrate that was prepared 2012/09/26

AA

  • Standard solutions were reprepared by Melissa Novy. Please refer to Melissa Novy's lab notebook for calculations and preparation

AA Data collected:

' Concentration [ppm] Abs. [ ] BG '
0.01-0.006000.00200
0.05-0.011600.00540
1-0.009200.00150
20.117100.00470
30.203300.00330
Given Conc. [ppm]Abs. [ ]BGConc. [ppm]
1 min NaMT-CuSO47.40.376900.004305.63990
100.476000.006207.01910
5 min NaMT-CuSO47.40.380800.003505.69420
100.481500.006007.09560
10 min NaMT-CuSO47.40.295400.003704.50580
100.376400.004805.63300
1 min 100%CEC NaMT-CuSO47.40.480300.006807.07890
100.618800.009509.00630
5 min 100%CEC NaMT-CuSO47.40.461200.006406.81310
100.620800.007909.03420
10 min 100%CEC NaMT-CuSO47.40.433000.004006.42070
100.629600.004809.15660
1 min 50%CEC NaMT-CuSO47.40.474700.005307.00100
100.620500.004909.03000
5 min 50%CEC NaMT-CuSO47.40.461100.003106.81170
100.609400.005808.87550
10 min 50%CEC NaMT-CuSO47.40.468000.003906.90770
100.596200.004408.69180

Crosslinking

  • The general protocol for crosslinking glutaraldehyde films described on 2012/09/14 was followed.
  • For the films containing porphyrin, the exact amount of H2SO4 fixant solution used, 1% aqueous HCl solution used, and sodium bicarbonate solution used was recorded. Small samples of each of the three samples used for crosslinking were saved for later UV-vis analysis
' PVOH MW 22,000+ 0.5mL glutaraldehyde+ 1mL porphyrin PVOH MW 22,000+ 0.5mL glutaraldehyde+ NaMT PVOH MW 22,000+ 0.5mL glutaraldehyde+ 100%CEC
Amount solution 1 added(mL)100.0100.099.90
Amount of 1% aqueous HCl added (mL)100.0100.098.0
Amount of 0.2M sodium bicarbonate solution added(mL)100.0100.0100.0
Amount of Sodium Bicarbonate added to sodium bicarbonate solution(g)1.68981.68091.6804
Mass of film after crosslinking (g)2.4394...3.0290

Crosslinking notes:

  • While porphyrin film was in the H2SO4 fixant solution, the film changed color from pink to yellow. Some yellow color leaked into the solution(uniformly). A good portion of color leaked out of during this step.
  • While taking out the film from the 1% aqueous HCl solution, the film did not have a frosted color to it(as other films not containing porphyrin had at this step). Instead, the film turned from yellowish to a relatively greenish tint. A good portion of color leaked out of the film during this step
  • When adding the film to the sodium bicarbonate solution, the film turned back into a light pinkish color. Color continued to leak out of film during this step. After 15 minutes the film still retained a faint pink color
  • From the amount of leakage, it appears as if 0.5mL glutaraldehyde per 1g PVOH in a large Teflon dish is not sufficient. For next film preparation, 1mL of glutaraldehyde will be used
  • approximately 12mL of each solution was saved after crosslinking




Personal tools