The Theory Of Moving Chelation Boundary And Its Application In Stacking And Separation Of Metal Ions

As the important roles of trace metal in human beings and their lives, it is very important to analyse and detect them. However, because the conventional metal detection methods have expensive fee and low sensitivity, it's very urgent to develop new methods.In this paper, based on the concept of moving chemical reaction boundary (MCRB), a model of two metal ions'moving chelation boundary (MCB) was created by the strong chelant EDTA and divalent metal ions: copper(II) and cobalt(II). Thus the model of two metal ions'MCB was established. From the MCB model, the expressions of the velocity of MCB and the stacking efficiency (SE) were deducted. To avoid getting the parameters difficult to obtain required in the calculations involved and simplify the computation, a very convenient and efficient data processing method was worked out to validate the theory by the large tube and capillary electrophoresis (CE) experiment. The experimental results well accord with the prediction, they showed: (1) Three boundaries exist in the two metal ions'MCB system, the MCB, [Cu-EDTA]^2- and [Co-EDTA]^2- complex boundary (CB). The new...