The use of ultraviolet spectrophotometry for quantitative inorganic analytical purposes has long remained unexploited. An extremely large number of complexes of metals have characteristic absorption properties in the visible portion of the spectrum and many colorimetric methods of analysis depend upon this fact. With the present availability of ultraviolet spectrophotometric equipment the charachteristic absorption properties of many colorless metallic complexes in the ultraviolet region of the spectrum should as conveniently be capable of similar utilization
