Spectrophotometric Reference for Inorganics?

[mishima]

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.

 

[Borek]

Visible?

Does the NaCl solution look colored?

Infrared? UV?

 

[mishima]

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.

 

[Yanick]

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.