Analysis of Preservatives DATA NO. C34

Conditions Column : Inertsil ODS-3V ( 5m , 1504.6mmI.D.) Flow rate : 1.0mL/min Eluent : Acetonitrile / 25mM Acetate buffer (pH4.3) = 40 / 60 Oven Temp. : 40 Detector : UV 240 nm Samples : Benzoic acid (30ug/mL) : Sorbic acid (20ug/mL) : Methyl paraben (20ug/mL) : Dehydroacetic acid (20ug/mL) : Ethyl paraben (20ug/mL) : iso-Propyl paraben (20ug/mL) : n-Propyl paraben (20ug/mL) : iso-Butyl paraben (20ug/mL) : n-Butyl paraben (20ug/mL) Sample Volume : 10L