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EXPERIMENT 2: INTRODUCTION TO SPECTROSCOPY ... visible, ultraviolet, or, X-ray radiation can be used to interact with matter. The Spectronic 20 instrument you will use can correctly be called a colorimeter, because it measures the absorption

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Ultra-violet Visible Spectroscopy by Alain Martelli I. Theoretical principles A. Introduction Many molecules absorb ultraviolet (UV) or visible light. The absorbance of a solution increases as attenuation of the beam increases. Absorbance is directly proportional to the path length, b, and the concentration, c, of the absorbing species, ...

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