User:Abigail E. Miller/Notebook/CHEM571 Lab Project/2012/10/08: Difference between revisions
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==Bench Work== | ==Bench Work== | ||
* 1000 ± 10μg of Au/mL of | * 1000 ± 10μg of Au/mL of solution ( 10 % v/v HCl) for the stock solution | ||
** from Inorganic Ventures cat# AAAU1-1, lot # F2-AU04012 | ** from Inorganic Ventures cat# AAAU1-1, lot # F2-AU04012 | ||
** 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 | ||
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For the AAS (atomic absorption Spectrometer), the published detection limit for gold is 0.2 ppm ( a 1% absorbance)for this instrument. recent experiment is closer to 2 ppm and since 20 ppm is roughly 0.1 mM Au, Therefore I created standards ranging from 5 to 40 ppm. | For the AAS (atomic absorption Spectrometer), the published detection limit for gold is 0.2 ppm ( a 1% absorbance)for this instrument. recent experiment is closer to 2 ppm and since 20 ppm is roughly 0.1 mM Au, Therefore I created standards ranging from 5 to 40 ppm. | ||
* created 50 mL of each standard: 5, 8, 10, 15, 20, 25, 30, 40 ppm Au from the 1000 ppm Au stock standard | * created 50 mL of each standard: 5, 8, 10, 15, 20, 25, 30, 40 ppm Au | ||
** | **from the 1000 ppm Au stock standard | ||
** using 50 mL volumetric flasks | |||
** all diluted in 1 M HCl | |||
{| {{table}} | {| {{table}} | ||
| align="center" |'''ppm''' | | align="center" |'''ppm''' |
Revision as of 11:51, 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 experiment is closer to 2 ppm and since 20 ppm is roughly 0.1 mM Au, Therefore I created standards ranging from 5 to 40 ppm.
Data/Spectra
Notes
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