A Response Surface Methodology (RSM) experiment was
designed incorporating the soaking time and temperature
ranging from 1-3 hours and 40-50°C, respectively as
the process variables (factors). A total of 13 different
combinations were worked out using Central Composite
Rotatable Design (CCRD) to investigate the effect of
aforementioned factors on the response variables viz.,
oxalate content (total and soluble), sensory acridity score,
hunter colour parameters, whiteness index and total
solids in soak water. The coded and actual values of the
process variables in the RSM experiment are given in