Research Article
Comparing the Heterogeneity of Copper-Binding Characteristics for Two Different-Sized Soil Humic Acid Fractions Using Fluorescence Quenching Combined with 2D-COS
Table 2
Copper-binding parameters1 calculated by the Ryan-Weber model.
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1Correlation coefficients of predicted versus observed fluorescence intensity (), relative percentage of fluorescence intensity for copper-saturated complexes ( (%)), conditional stability constants (), and complexing capacities () and fraction of the initial fluorescence corresponding to binding sites (). 2The peak wavelengths were selected based on peaks observed in the synchronous and asynchronous maps of 2D-COS in Figure 2. 3The peak wavelengths were selected based on the apparent shapes of the synchronous fluorescence spectra in Figure 1. * value < 0.001. |