This work shows that optimal conditions for the TA extraction
depends on the form of the potato used (raw freeze dried, microwaved
or raw sliced potato). Overall a higher solvent:water ratio
increases the TA extracted, however in certain circumstances
(use of microwave potato) UAE enabled the amount of solvent used to be decreased (making UAE a greener technology) and/or to
decrease the extraction time. It should be pointed out that the success
of the UAE is dependent on several factors and in this work all
the variables studied (form of potato, ultrasonication time, amplitude
and solvent ratio) have an effect on the levels of extracted
anthocyanins. Generally, although UAE proved to be a helpful technology
for anthocyanin extraction, using longer extraction times
can destroy this bioactive compound.