1. In an advanced instrumental analysis experiment you obtained the calibration data listed in the table below; subsequent analysis of a river water sample gave a signal of 27.5. Conduct a second order calibration, write out the calibration equation you determined, state the fraction of variability described by your equation, plot the data along with the predicted concentrations, and then calculate the river sample concentration.
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
per mL of concentrated sample |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
3. From your results in problem 2, use propagation of error to calculate the uncertainty in your calculated Au concentration in units of ng/mL.