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Homework Help: Calibration curve and concentration?

  1. Jun 4, 2010 #1
    calibration curve and concentration??

    The following is all of the data I have from a AAS/FES for water analysis. I need to make the calibration curves for calcium and sodium. and then I have to find the concentration. can someone please help me with this? i know that the Abs values will be one of my axes but im confused on what my other axes would be. any help will be appreciated!

    Calcium (422 nm/2)

    Standards: Abs:
    10ppm 0.06
    25ppm 0.132
    50ppm 0.245
    75ppm 0.375
    100ppm 0.44
    Sample: Abs:
    Outside Tap 0.295
    Kitchen Tap 0.31
    Hose Tap 0.23
    Drinking Tap 0.23
    Kress 0.061
    Oaks Kitchen 0.145
    Barkley Fountain 0.15
    La Fetra Fountain 0.165

    Sodium (589 nm/2)

    Standards: Abs:
    1ppm 0.09
    5ppm 0.345
    10ppm 0.525
    25ppm 0.848
    50ppm 1.275
    75ppm 1.52
    Sample: Abs:
    Outside Tap 0.841
    Kitchen Tap 0.762
    Hose Tap 0.944
    Drinking Tap 0.944
    Kress 0.034
    Oaks Kitchen 1.248
    Barkley Fountain 1.208
    La Fetra Fountain 1.208
     
  2. jcsd
  3. Jun 5, 2010 #2

    Borek

    User Avatar

    Staff: Mentor

    Re: calibration curve and concentration??

    x - concentration, y - absorbance.

    --
    methods
     
  4. Jun 6, 2010 #3
    Re: calibration curve and concentration??

    how do I find the concentration?
     
  5. Jun 6, 2010 #4

    Borek

    User Avatar

    Staff: Mentor

    Re: calibration curve and concentration??

    It is given for your standards, isn't it? Or are you looking at something different from what you have posted?

    --
     
  6. Jun 6, 2010 #5
    Re: calibration curve and concentration??

    ohhhhh!!! so my calibration curves are only going to be of the standards, right? because everything that I posted is all the data I have.
     
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