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Measurements of the major cations Ca and Mg by the technique of diffusive gradients in thin films (DGTs) were systematically evaluated. The concentration in solution was calculated using Fick's first law of diffusion from the directly measured flux to the DGT device. A selective cation exchange resin (Bio-Rad Chelex ( R)100), which has been used extensively with DGT for trace metals, such...
Diffusive gradients in thin films (DGT) is a recently developed technique capable of in situ measurement of labile metal species in water. Tests of the performance of DGT were extended in this work to cover a wide range of environmentally relevant conditions. DGT accurately measured Cd concentrations in 0.01M NaNO 3 solutions in the pH range 5-10 and Co, Mn and Zn concentrations, between pH...
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