User:Abigail E. Miller/Notebook/CHEM571 Lab Project/2012/10/08: Difference between revisions
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** the solution is certified by ICP (ion couple plasma spectroscopy) to NIST SRM 3121 | ** the solution is certified by ICP (ion couple plasma spectroscopy) to NIST SRM 3121 | ||
For the AAS (atomic absorption Spectrometer), the published detection limit for gold is 0.2 ppm ( a 1% absorbance)for this instrument. recent | For the AAS (atomic absorption Spectrometer), the published detection limit for gold is 0.2 ppm ( a 1% absorbance) for this instrument. recent experiments put the detection limit closer to 2 ppm for gold, and since 20 ppm is roughly 0.1 mM Au, therefore I created standards ranging from 5 to 40 ppm. | ||
For reference the molecular weight of gold is 197 g/mol. | |||
* created 50 mL of each standard: 5, 8, 10, 15, 20, 25, 30, 40 ppm Au | * created 50 mL of each standard: 5, 8, 10, 15, 20, 25, 30, 40 ppm Au |
Revision as of 11:57, 8 October 2012
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Objective
Bench Work
For the AAS (atomic absorption Spectrometer), the published detection limit for gold is 0.2 ppm ( a 1% absorbance) for this instrument. recent experiments put the detection limit closer to 2 ppm for gold, and since 20 ppm is roughly 0.1 mM Au, therefore I created standards ranging from 5 to 40 ppm. For reference the molecular weight of gold is 197 g/mol.
Data/Spectra
Notes
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