What cations and anions could be analyzed quantitatively by visible spectroscopy?

Answer 1

I suppose that all can be analyzed but you must know the spectroscopic data (wavelength of absorption and emission)

Answer 2

Only the ones that have colors could be analyzed by visible spectroscopy (yeah, I know it's obvious). The problem is that I don't remember which ones they are xD. And I think they should be in a relatively high concentration, for trace amounts would require a more sensitive method.