Nevertheless, the urease test has
been one of the most popular and inexpensive methods
used to assess the adequacy of heat treatment of SBM
as urease has been reported to be destroyed at a similar
rate as trypsin inhibitors (Caskey and Knapp, 1944;
Wright, 1981). Indeed, when performing trypsin inhibitors
analyses, several laboratories have used the urease
test to determine the appropriate dilution of the 2 mL
of soy sample extract to inhibit 40 to 60% of the trypsin
used for the analysis (Hamerstrand et al., 1981).