User:Anh Do/Notebook/CHEM 471/2017/10/03

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Task List

  • Run ICP on gold standard and AuNP solutions

Description

  • Prepared 5 ICP standards for Au (as recorded in template below)
  • Diluted all HAuCl4 stock solutions to range of 100 - 1000 uM

ICP Template

HAuCl4ICP.jpg

Data

(From Dominique's lab note)

To calculate stock solution concentrations we used the Au-R 242.794nm column since the standards measured after were closest to our actual standards. The following calculation was used:

86.15ug/mL*1000mL/L*1g/10^6ug*1mol/196 = 4.395*10^-4 M

Since the first solution (supposedly 2.5mM HAuCl4) was diluted 1:5 that number was multiplied by five to give 2.19 mM as our actual concentration for our 2.5 mM gold solution. For our second solution (10mM) the same calculation was used but since the dilution was 1:10 it was multiplied by ten to give 9.075 mM as our actual concentration.

The gold nano-fiber vs nanoparticle concentrations of gold in solution were as expected with the nanoparticles having a much higher concentration than the nano fibers.