Conditions
 Column : Inertsil ODS-3 ( 5 m , 150 4.6mmI.D.)
Flow rate : 1.0mL/min
Eluent : Acetonitrile / 0.1M perchlorate buffer (pH 2.5) = 75 / 25
Oven Temp. : 40
Detector : ECD 1100mV vs Ag/AgCl
Samples : 4-Hexylphenol (10mg/L) , 4-Heptylphenol (10mg/L)
4-tert-Octylphenol (10mg/L) , 4-Nonylphenol (10mg/L)
in 100%
Sample Volume : 50L
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