The microwave ovenwas provided
with a probe (CR/JP/11/11671, Enelec, Spain) which was connected
to a fiber optic thermometer (FOTEMP1-OEM, Enelec, Spain) to
continuously record the time-temperature history of the sample
during the microwave treatments. Because MW has traditionally
been associated with non-uniform heating, the coldest and the
hottest spots were identified and the temperature at these points
was recorded.