In lab, you will be participating in a study we have performed in previous semesters, analyzing beer. Samples of beer were measured for residual iron contamination. A calibration curve was made up using solutions of Fe(NO3)2 that were carefully made to accurate yield Fe concentrations given in the attached excel spreadsheet. Note that concentratiens are given in units of micrograms/Liter (* parts-per-billion by mass). Using the given calibration curve data, determine the concentration of Fe in each of indicated beers. Since there are three replicates of each calibration point and of each sample, you should use the average value of the three measurements for each sample. You do not need to be concerned about error analysis or experimental uncertainty in this particular problem.
In lab, you will be participating in a study we have performed in previous semesters, analyzing beer. Samples of beer were measured for residual iron contamination. A calibration curve was made up using solutions of Fe(NO3)2 that were carefully made to accurate yield Fe concentrations given in the attached excel spreadsheet. Note that concentratiens are given in units of micrograms/Liter (* parts-per-billion by mass). Using the given calibration curve data, determine the concentration of Fe in each of indicated beers. Since there are three replicates of each calibration point and of each sample, you should use the average value of the three measurements for each sample. You do not need to be concerned about error analysis or experimental uncertainty in this particular problem.
Chapter6: Random Errors In Chemical Analysis
Section: Chapter Questions
Problem 6.16QAP
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Am i doing right on this?? Or wrong?
(Determining conc of unknown using calibration curve)
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Step 1
Absorbance and concentration are related as follows:
Because of the linear relationship, the graph between absorbance and concentration is a best fit straight line.
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