FOULING OF MODEL SURFACES - ADSORPTION AND REMOVAL OF WHOLE UNPASTEURIZED MILK

The surface adsorption behaviour of whole unpasteurized milk at an ope n circuit platinum electrode has been investigated by dipping the elec trode into fresh unprocessed milk thermostatted to temperatures over t he range 299-363 K. Cyclic voltammetry was used to measure the charge density resulting from milk adsorption at the electrode surface after the electrode was transferred to an electrochemical cell containing ph osphate buffer (pH 7.0, 0.33 M ionic strength). Removal of milk adsorb ates was studied by measuring the current response during extended pot ential cycling in the phosphate buffer maintained at 273 K, 299 K and at the temperature of the milk. The results obtained suggest a possibl e treatment for and prevention of the fouling of surfaces resulting fr om the processing of milk.