User:Alicia Rasines Mazo/Notebook/CHEM-581 Experimental Chemistry I/2014/10/08
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Tasks for October 8
Procedure followed as described by Dr. Hartings on Oct. 1
Preparation of 20 ppm MG green
Starting from a 195 ppm MG stock solution, 1.026 mL were added to a 10 mL volumetric flask and made up to the mark with distilled water.
UV-Vis absorbance was used to determine the concentration of the dilution made. Because of detection limits, the '20 ppm' MG solution was diluted by a factor of 10.
Using absorbance values at 615 nm and calibration curve for MG obtained on Sept. 5, the actual concentration was found to be 20.34ppm and the stock solution from which the dilution was made: 198.39ppm.
Completion of film synthesis
Placed film in sodium sulfate, 1% HCl and sodium bicarbonate.