Figure 5From: New spectrofluorimetric methods for determination of melatonin in the presence of N-{2-[1-({3-[2-(acetylamino)ethyl]-5-methoxy-1H-indol-2-yl}methyl)-5-methoxy-1H-indol-3-yl]- ethyl}acetamide: a contaminant in commercial melatonin preparations Second order derivative emission calibration spectra of MLT in methanol (20-220 ng ml -1 ) using λ excitation at 279 nm. Back to article page