Y ¼ a0 þ a1X1 þ a2X2 þ a3X3 þ a12X1X2 þ a13X1X3 þ a23X2X3
þ a11X21
þ a22X22
þ a33X23
where Y is the emulsified volume, ai are the regression coefficients,
and X1, X2, and X3 are the experimental factors. Confidence intervals
were evaluated with T95%,3 as the Student coefficient