Apparent Concentration Quenching of Morphine Fluorescence

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Science  15 Mar 1963:
Vol. 139, Issue 3559, pp. 1063-1064
DOI: 10.1126/science.139.3559.1063


Fundamental fluorescence equations were examined. Deviations from the theoretical were observed by varying the light path length to determine effects on "apparent" fluorescence. It was found that the decrease in emission of morphine solutions with the increase in concentration was caused by absorption effects that prevented excitation of the whole system.