Europium(III) complexed by HPSEC size-fractions of a vertisol humic acid: small differences evidenced by time-resolved luminescence spectroscopy.
作者： Pascal E. Reiller , Julien Brevet , Antonio Nebbioso , Alessandro Piccolo
DOI: 10.1016/J.SAA.2010.12.075
关键词: Humic acid 、 Luminescence 、 Analytical chemistry 、 Chemistry 、 Vertisol 、 Spectroscopy 、 Europium 、 Elution 、 Fractionation 、 Size-exclusion chromatography 、 Nuclear chemistry
摘要: The size fractionation of a humic acid (HA) by high performance exclusion chromatography (HPSEC) was used as proxy for the filtration effect during HA transport through porous medium with minimum specific chemical interactions. modification Eu(III)-HA complexes' formation different size-fractions, compared to bulk HA, studied in time-resolved luminescence spectroscopy (TRLS). Clear modifications structures were shown and related molecular characteristics separated size-fractions. properties most size-fractions did not induce major alteration affinity towards Eu(III). Only hydrophilic fractions eluted tail chromatographic peak, representing about 11% total fractions-weight, gave some significantly parameters. Using simplistic complexation model, it found that available sites decreased reduction fractions.
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