Solid phase extraction of aspartame
Additional purification was carried out using a SPE C18 cartridge,
previously activated with 3 ml methanol and 20 ml water,
as flavourings and fat could not be separated by carrez clarification.
2 ml of the carrez clarified filtrate was added to the activated cartridge
and eluted with 10 ml of mobile phase A followed by 10 ml
of mobile phase B. The isolate obtained was collected in a 25 ml
volumetric flask and finally the volume was made up to the mark
with a mixture of mobile phases A and B (1:1). A blank experiment
was also performed simultaneously. A 20 ll aliquot of the filtrate
was injected into the HPLC.