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Spectrophotometric Reference for Inorganics?

  1. Apr 15, 2014 #1
    I am looking for absorbance spectra and extinction coefficients (molar absorptivities) for common inorganic substances like potassium and sodium salts. I am only finding this information for biological substances.

    Am I misinterpreting what the spectrophotometer can do? I would like to, for example, use Beer's Law to calculate concentration of a salt in solution after measuring absorbance with a known extinction coefficient.
  2. jcsd
  3. Apr 15, 2014 #2


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    Staff: Mentor


    Does the NaCl solution look colored?

    Infrared? UV?
  4. Apr 15, 2014 #3
    I mean salts in general, like potassium permanganate or copper (II) nitrate. I am unaware if sodium chloride can be used with a spectrophotometer; I was under the impression that some could not.

    would like an absorbance spectrum (absorbance vs. wavelength), so all wavelengths. I would have thought this information would be tabulated somewhere, like a chemical handbook, but I am not finding it.
  5. Apr 15, 2014 #4
    You can try here: http://webbook.nist.gov/chemistry/

    Failing that you should just try to find the original research. It will likely be old which makes it (kind of) easier to find them for free.
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