Column: Develosil ODS-UG-5 250 x 4.6 mm
Mobile phase: Acetonitrile/20 mM sodium acetate (pH4.2)
Flow rate: 1.0 mL/min
Temperature: 30 C
Detection: UV @254 nm
Sample:
1.Benzoic acid (BA)
2.Sorbic acid (SOA)
3.Dehydroacetic acid (DHA)
4.p-Hydroxybenzoic acid ethyl ester
5.p-Hydroxybenzoic acid iso-propyl ester
6.p-Hydroxybenzoic acid n-propyl ester
7.p-Hydroxybenzoic acid sec-butyl ester
8.p-Hydroxybenzoic acid iso-butyl ester
9.p-Hydroxybenzoic acid n-butyl ester