User:Karlena L. Brown/Notebook/PVOH Research/2012/10/02

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OBJECTIVES

  1. Crosslink all glutaldehyde films
  2. Make standard dilution CuSO4 solutions from the 20ppm CuSO4 stock solution for atomic absorption

Crosslinking Glutaldehyde Films

PROCEDURAL STEPS FOR CROSSLINKING CAN BE FOUND UNDER 9/21/12

Prepared PVOH 22K Films For Crosslinking

' PVOH 22K w/ GA PVOH 22K w/ GA & PDMS PVOH 22K w/ GA & NaMT PVOH 22K w/ GA & 100% CEC NaMT PVOH 22K w/ GA & 50% CEC NaMT
Original Mass PVOH used (g) 0.5141 0.9499 0.4880 0.7665 0.4691
New Crosslinked Mass PVOH (g) 0.5126 0.8521 0.9621 1.3971 0.9567


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

  1. Initiate the copper lamp by rotating the knob on the right side of the machine to the copper lamp
  2. Flip slit width to 0.7nm by rotating the knob on the left
  3. Place distilled H2O in the sample entry tube
  4. Turn on the machine, acetylene gas(red tank), and the air tank(yellow tank)
  5. Open AA wizard on the computer
  6. Click element select, flame, and the edit parameters window
  7. Select a metal (Cu with wavelength = 354.8nm)
  8. Edit measurement parameters to SM-M-M and then edit calibration curve to ppm and first order
  9. Select next and double click on calibration curve
  10. Enter calibration and number of standard solutions created: lowest concentration to highest concentration
  11. Next, label all samples and hit "Collect Send"
  12. Once the Instrument Checklist box appears check off all boxes
  13. Hold the purge button on the machine to check that the air and fuel level are at the right level(1,8,8)
  14. Click line search and then finish.
  15. Hold the purge and ignite button on the AA until a flame appears
  16. Allow the sample tube to collect distilled H2O for an autozero
  17. 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

Notes:

  • Due gold nano-particles clogging the collection tube for atomic absorption samples, all collection data was viewed as being inaccurate along with invalid. Therefore, the collection tube will be replaced and atomic absorption data will be collected next class.


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