Fluorescence Components Peak position λEx/Em(nm) Literature reported
Description Ex/Em (nm) Reference
C1 230,280/320 tyrosine-like 230/325-350 [1]
280/320-350; [25]
270-280/320-350; [26]
C2 240,305/355 tryptophan-like <250(290)/360 [27]
<250 (290)/360 [28]
C3 270,340/480 Terrestrial humic-like 230-260/380-480 [29]
320-360/420-480
Table 1: Positions of the fluorescence maxima of the three components.