OBJECTIVES
- Crosslink all glutaldehyde films
- Make clay exchanged CuSO4 solutions for atomic absorption
Crosslinking Glutaldehyde Films
PROCEDURAL STEPS FOR CROSSLINKING CAN BE FOUND UNDER 9/21/12
Prepared PVOH 22K Films For Crosslinking
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PVOH 22K w/ GA
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PVOH 22K w/ GA & PDMS
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PVOH 22K w/ GA & NaMT
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PVOH 22K w/ GA & 100% CEC NaMT
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PVOH 22K w/ GA & 50% CEC NaMT
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Original Mass PVOH used (g) |
0.5141 |
0.9499 |
0.4880 |
0.7665 |
0.4691 |
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New Crosslinked Mass PVOH (g) |
0.5126 |
0.8521 |
0.9621 |
1.3971 |
0.9567 |
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NOTES:
- Description of the PVOH 22K w/GA & NaMT film: thin yellow cream colored appearance, extremely stiff film with limited transparency
- Description of the PVOH 22K w/GA & 100% CEC NaMT film: thin yellow cream colored appearance, extremely stiff spotted film with limited transparency (the spotted areas stem from the presence of clay within the substance)
- Description of the PVOH 22K w/GA & 50% CEC NaMT film: thin yellow cream colored appearance, extremely stiff spotted film with limited transparency (the spotted areas stem from the presence of clay within the substance)
Atomic Absorption Procedures
- Initiate the copper lamp by rotating the knob on the right side of the machine to the copper lamp
- Flip slit width to 0.7nm by rotating the knob on the left
- Place distilled H2O in the sample entry tube
- Turn on the machine, acetylene gas(red tank), and the air tank(yellow tank)
- Open AA wizard on the computer
- Click element select, flame, and the edit parameters window
- Select a metal (Cu with wavelength = 354.8nm)
- Edit measurement parameters to SM-M-M and then edit calibration curve to ppm and first order
- Select next and double click on calibration curve
- Enter calibration and number of standard solutions created: lowest concentration to highest concentration
- Next, label all samples and hit "Collect Send"
- Once the Instrument Checklist box appears check off all boxes
- Hold the purge button on the machine to check that the air and fuel level are at the right level(1,8,8)
- Click line search and then finish.
- Hold the purge and ignite button on the AA until a flame appears
- Allow the sample tube to collect distilled H2O for an autozero
- After autozero is complete, sample labeled samples in the order in which they were entered
NOTES:
- For SM-M-M, typically the machine makes a single run, but takes an average absorbance from three sample collections
- Fuel gas parameter should always be at 1.8 L/min and support gas at 8 L/min
Atomic Absorption Standard Dilutions & Calculations
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