Table 5.

Regression equations for ascorbic acid degradation of guava juice.

Sample	Regression Equation	R2	Activation Energy(kj/mol)
S1	Ct/C0 = e−0.023t	0.996	5163.62
S2	Ct/C0 = e−0.018t	0.997
S3	Ct/C0 = e−0.021t	0.992
S4	Ct/C0 = e−0.019t	0.995
S5	Ct/C0 = e−0.016t	0.993
S6	Ct/C0 = e−0.022t	0.998
S7	Ct/C0 = e−0.019t	0.997
S8	Ct/C0 = e−0.017t	0.995

S₁ = Juice (without preservative) at RMT; S₂ = Juice (without preservative) at RFT (4 °C); S₃ = Juice contained KMS 150 ppm; S₄ = Juice contained KMS 200 ppm; S₅ = Juice contained KMS 250 ppm; S₆ = Juice contained Sodium Benzoate 150 ppm; S₇ = Juice contained Sodium Benzoate 200 ppm; S₈ = Juice contained Sodium Benzoate 250 ppm.