Figure 1.

Temperature control of the transference chamber. Precooled or heated fluid (1:2, glycerol:water [v/v]) was pumped through a metallic tube (i.d., 2 mm) embedded in the stainless-steel chamber. The tube surrounded the compartments; the inlet and outlet are visible in the figure. The temperature in the solutions was measured with a thermocouple (±0.1°C). The variations in temperature remained within 1°C in the central part of the compartments. Dimensions of the metallic slide were 76 × 26 × 5 mm.