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Photosynthetic Pigments Photosynthetic Pigments Jessica Tietgens Botany Lab 2 May 2008 Photosynthetic Pigments Introduction: In this lab we were to investigate photosynthetic pigments using paper chromatography and then using the spectrophotometer determine the absorption for each pigment. Since the lab before had a difficult time getting all 5 pigments to show, it was expected we.