Sorption isotherms of surfactants on sepiolite at added concentrations below their cmc.

<p>Sorption isotherms of surfactants on sepiolite at added concentrations below their cmc.</p

Clay-surfactant formulations.

<p>Clay-surfactant formulations.</p

Parameters of the Freundlich equation describing the adsoption isotherms of the herbicides and surfactants on sepiolite.

<p>Parameters of the Freundlich equation describing the adsoption isotherms of the herbicides and surfactants on sepiolite.</p

<i>In-vitro</i> water release of MS (a) and MZ (b) formulations versus their technical products.

<p><i>In-vitro</i> water release of MS (a) and MZ (b) formulations versus their technical products.</p

Phase solubility diagrams of the herbicides in the presence of surfactants.

<p>Phase solubility diagrams of the herbicides in the presence of surfactants.</p

Surface and chemical properties of the surfactants.

§<p>HLB, hydrophilic-lipophilic balance; cmc, critical micellar concentration.</p>f<p>Determined from surface tension measurements.</p

Electrochemical oxidation of bentazon.

<p>(A) Differential pulse voltammetry curves for 5.0×10⁻⁴ M Btz in buffer phosphate pH 6.0 in the absence and presence of different HPCD concentrations. Curves 1–10: 0, 2, 4, 6, 8, 10, 12, 14, 20 and 30 mM HPCD; (B) Current dependence on the concentration of HPCD for bentazon in buffer phosphate pH 6.0. Current values obtained from DPV measurements. Inset: Plot of 1/[CD] versus 1/(1-I/I₀) for bentazon in buffer phosphate pH 6.0.</p