User:Matt Hartings/Notebook/Photosynthesis/2013/10/21

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Objective

Take kinetic data for Mb (lyophilized from KCl/phosphate buffer) catalyzed o-phenylenediamine + H2O2 reaction in methanol (25, 35, and 45C).

Procedure and Data

sample 1

  1. Stock solutions:
    1. Myoglobin
      1. 1.2mg (Mb:KCl lyophilized from Citrate, 5mg:500mg) in 1.0mL methanol
    2. OPD
      1. 3.2mg OPD in 3.2mL methanol
    3. H2O2
      1. 0.114mL 30% H2O2 in 0.887mL methanol
  2. Experimental Run
    1. Sample chamber set to 25C and to stir
    2. N2 run through the cuvette holder to reduce condensation on cuvette
    3. 2.025mL OPD stock solution
    4. 0.75mL H2O2 stock solution
      1. Start Data Collection
      2. 1ms Integration
      3. 10 scan average
      4. Wait 1 minute after each scan
      5. Stop after 2 hours
    5. Files saved as: Mb_OPD_H2O2_phosphate_meoh_25_SCANNUMBER.txt
    6. 0.225mL Mb stock solution added just before the third scan
    7. This is denoted in the data file for the third scan

sample 2

  1. Stock solutions:
    1. Myoglobin
      1. same as above
    2. OPD
      1. 2.5mg OPD in 2.5mL methanol
    3. H2O2
      1. 0.114mL 30% H2O2 in 0.887mL methanol
  2. Experimental Run
    1. Sample chamber set to 35C and to stir
    2. N2 run through the cuvette holder to reduce condensation on cuvette
    3. 2.025mL OPD stock solution
    4. 0.75mL H2O2 stock solution
      1. Start Data Collection
      2. 1ms Integration
      3. 10 scan average
      4. Wait 1 minute after each scan
      5. Stop after 2 hours
    5. Files saved as: Mb_OPD_H2O2_phosphate_meoh_35_SCANNUMBER.txt
    6. 0.225mL Mb stock solution added just before the third scan
    7. This is denoted in the data file for the third scan

sample 3

  1. Stock solutions:
    1. Myoglobin
      1. same as above
    2. OPD
      1. 3.0mg OPD in 3.0mL methanol
    3. H2O2
      1. 0.114mL 30% H2O2 in 0.887mL methanol
  2. Experimental Run
    1. Sample chamber set to 45C and to stir
    2. N2 run through the cuvette holder to reduce condensation on cuvette
    3. 2.025mL OPD stock solution
    4. 0.75mL H2O2 stock solution
      1. Start Data Collection
      2. 1ms Integration
      3. 10 scan average
      4. Wait 1 minute after each scan
      5. Stop after 2 hours
    5. Files saved as: Mb_OPD_H2O2_phosphate_meoh_45_SCANNUMBER.txt
    6. 0.225mL Mb stock solution added just before the third scan
    7. This is denoted in the data file for the third scan



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