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Interpolation vs Extrapolation

  1. Jan 25, 2006 #1
    Could someone help me understand why interpolation rather than extrapolation should be used for calibration curves (with the exception of Standard additions). I know that extrapolation is less precise, but the book I've got doesn't over any more than that, and I think I need a little more detail for an exam.:biggrin:
     
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  3. Jan 25, 2006 #2

    Gokul43201

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    Well, what does a calibration curve tell you ?
     
  4. Jan 25, 2006 #3
    The relationship between concentration and signal strength for the analyte.

    Would I be right in saying that you can't extrapolate as you can't be sure the curve remains linear (e.g because of self-absorbtion in ICP-AES)?
     
  5. Jan 25, 2006 #4

    Gokul43201

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    That's exactly right !
     
  6. Jan 25, 2006 #5
    Wow, I feel so very stupid *smacks head*
     
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