User:Andrew W Long/Notebook/CHEM-671 Research/2015/09/09

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Reaction and UV-Vis Kinetic Analysis of Proteinase-K and Gold Nanoparticle Fibers & Preparation of Proteinase-K Stocks Today proteinase-K was reacted with previously prepared gold nanoparticle fibers. Absorbance data from the reaction was taken every 2minutes for 2.5 hours in the OceanOptics Spectrophotometer. Mass of Eppendorf tube: 1.01522 g Mass of proteinase-K: 0.00104g (ideal value was 0.00100) Volume of water added to proteinase-K: 0.001L Molar mass of proteinase-K: 28,900g/mol Molarity of resulting solution: (0.00104g)*(1mol/28,900g)*(1/0.001L)=0.00003599M Next we solved for the volume of the proteinase-K / water solution needed to make a 3mL 1uM final solution. M1*V1=M2*V2 => (0.00003599)*(V1)=(0.000001)*(0.003) => V1=0.00008336L = 0.08336mL So since we know we must add 1mL of fibers, 0.08336mL of proteinase-K solution, and 0.3mL of buffer, we need 1.617mL of water to get a final solution of 3mL. We added all components of the solution to a quartz cuvette, waited until the second recording on the OceanOptics, and added the 0.08336mL of proteinase-K (therefore the second recording is t=0 for the kinetics workup). Next, 1mg stocks of proteinase-K were prepared and stored in the freezer. Tube Number Mass of Tube (g) Mass of Proteinase-K (g) 1 1.02157 0.00085 2 1.03162 0.00087 3 1.02798 0.00095 4 1.03275 0.00114 5 1.03057 0.00123 6 1.01392 0.00067 7 1.02938 0.00118 8 1.02917 0.00123 9 1.02993 0.00085 10 1.02223 0.00127 11 1.02055 0.00107 12 1.03129 0.00103 13 1.01359 0.00121 14 1.02997 0.00129 15 1.03117 0.00116 Matt Hartings please make that graph just lines instead of lines and points and reset the axes so that the any "changes" might be seen. Say ... y axis from 0 to 0.05