Literature depicts various analytical methods for determination of
GOD. Tongbu et al. (1996) used titrimetric method for determination
of the GOD. In this method, enzyme solution was added to sodium
acetate buffer containing 2% β-D-glucose and the reactionwas stopped
by adding sodium hydroxide solution. The resulting mixture was
titrated with standard hydrochloric acid solution to calculate volume
of added standard HCl and thereby to calculate GOD activity.
Most researchers use an analytical method for GOD that is based
on the principle that GOD oxidizes β-D-glucose in the presence of
oxygen to β-D-glucono-δ-lactone and H2O2. The H2O2 is then utilized
to oxidize a chromogenic substrate in a secondary reaction with
horseradish peroxidase (HRP) with a resultant color change that