2.1. Materials
The oil soluble emulsifier, polyglycerol polyricinoleate (PGPR),
was kindly provided by Palsgaard, Denmark (PGPR 4150). High
oleic sunflower oil was supplied by PepsiCo Intl. Calcium chloride
(C8106), castor oil (259853) and glycerol (G7757) were purchased
from Sigma Aldrich (UK). Double distilled de-ionised water was
used for the preparation of all solutions.