User:Douglas M. Fox/Notebook/AU CHEM-571 F2011 Lab Support/2014/10/01: Difference between revisions
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== | ==Tasklist== | ||
* | # GPC for one more group | ||
# Finish Ca<sup>2+</sup> and Cl<sup>-</sup> calibration curve & interferences | |||
# Analyze Dialysis Solutions | |||
# Try week long dialysis using different CaCl<sub>2</sub> solutions or 20,000 MWCO tubing? | |||
==Analysis of Dialysis Solutions== | |||
* Remove 20 μL of solution from each chamber (10 in all) and run Bradford analysis | |||
**Bradford reagent should be diluted 1:3 with 50mM Tris/50mM NaCl | |||
**Recall, 20 μL solution + 200 μL diluted Bradford + 780 μL Tris/NaCl buffer | |||
**PS cuvettes, measuring 400 - 800 nm | |||
**Don't forget to run a blank with just Bradford & buffer | |||
**Don't forget to run your undialyzed Lysozyme stock | |||
* Transfer remainder of each cell into 20 mL extraction vials | |||
* Measure Ca<sup>2+</sup> using ISE | |||
* Transfer 100 μL to a small volume UV cuvette & measure UV absorption | |||
**Be sure your cuvette is clean before hand. Use SDS, HCl, HPLC, & methanol washes | |||
**Measure entire 200 - 800 nm range | |||
* Transfer 100 μL to a small volume fluorescence cuvette & measure fluorescence | |||
**Be sure your cuvette is clean before hand. Use SDS, HCl, HPLC, & methanol washes | |||
**excitation at 280 nm | |||
* Transfer 500 - 700 μL to a 15 mL Falcon tube. Add 2 - 3 times volume of water & measure pH | |||
**You want to add minimum amount of water | |||
**You typically need 1.6 - 2 mL in falcon tube to cover pH probe | |||
**So, if you have only 500 μL left, you'll need a 4x dilution (adding 1.5 mL water) | |||
**Or, if you have 700 μL left, you only need a 3x dilution (adding 1.4 mL water) | |||
Revision as of 08:07, 1 October 2014
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Tasklist
Analysis of Dialysis Solutions
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