精选优质文档-倾情为你奉上Ultraviolet and visible molecular spectroscopyProbably the first physical method used in analytical chemistry was based on the quality of the color in colored solution. The first things we observe regarding colored solutions are their hue，or color，and the colors depth，or intensity.These observations led to the technique historically called colorimetry;the color of the solution could identify species(qualitative analysis) while the intensity of the color could identify the
