electrode was rinsed with a few milliliters of water. About 100 mg
of pancreatin was added and incubated at 40 C in a water bath
with agitation for 60 min. The pH was adjusted to 4.5 with 4 mol
HCl/L. The contents were filtered through a dried and weighed
crucible (porosity 2) containing 0.5 g of dry Celite as the filter aid.