Binding of s-riazines to dissolved humic substances: electrophoretic approaches using affinity capillary electrophoresis (ACE) and micellar electrokinetic chromatography (MEKC)

摘要

Binding studies were conducted between s-triazines and soil and water extracted fulvic and humic acids (FA and HA) using capillary electrophoretic methods. A first approach to estimate simulaaneously the affinity of several s-triazines (hydroxyatraxine, ameline, atraton and ametryn) to dissolved humic substances (HS) was done with the affinity capillary electrophoresis (ACE) modus; the limits of the ACE method resulted in the measurement of the electrophoretic mobility of the pesticide-HS complexes. In a second approach, the partition of the s-triazines between the water and the dissolved humic substances was successfully described like in micellar electrokinetic cheomatography (MEKC) using the humic substances as micellar phase.