Table 5.
The linear ity of calibration curve in preservatives

Preservatives1)	Linearity	R2 Value	Concentration range (mg/kg)
DHA	y = 7.39631e-006χ + 0.00	0.991	10.08 ~ 100.8
SA	y = 1.56496e-005χ + 0.00	0.999	10.03 ~ 100.3
BA	y = 7.62783e-006χ + 0.00	0.996	10.05 ~ 100.5
POBM	y = 7.28783e-006χ + 0.00	0.990	10.04 ~ 100.4
POBE	y = 7.84591e-006χ + 0.00	0.994	10.06 ~ 100.6
POBIP	y = 8.67497e-006χ + 0.00	0.995	10.00 ~ 100.0
POBP	y = 8.48042e-006χ + 0.00	0.994	10.00 ~ 100.0
POBIB	y = 8.92473e-006χ + 0.00	0.997	10.06 ~ 100.6
POBB	y = 9.00878e-006χ + 0.00	0.997	10.03 ~ 100.3

DHA : Sodium Dehydroacetate, SA : Sorbic acid, BA : Benzoic acid, POBM : Methyl p-Hydroxybenzoate, POBE : Ethyl p-Hydroxybenzoate, POBIP : Isopropyl p-Hydroxybenzoate, POBP : Propyl p-Hydroxybenzoate, POBIB : Isobutyl p-Hydroxybenzoate, POBB : Butyl p-Hydroxybenzoate