Figure 3From: A comparison of aggregation behavior in aqueous humic acidsVariation of the I1/I3 ratio of the pyrene (1.0 × 10-7 M) emission with Mg2+ concentration in 10 ppm HA solutions. LSLHA (■); RSHA (◆); SRHA (■); SHHA (●); PLVHA (●); LHA (π).Back to article page