samples were adjusted to pH = 6 with
0.1 M NaHCO3 and suspended in simulated intestinal juice
(0.05 g of pancreatin (activity equivalent 4USP) and 0.3 g of bile
extract in 2.0 ml 0.1 M NaHCO3; adjusted to pH = 7 with 1 M NaOH
and finally 1.25 ml of 120 mM NaCl and 5 mM KCl was added to
the sample