Analysis of Principal Component of Oil-Soluble Imidazoline Corrosion Inhibitor via Reverse-Phase High Performance Liqu id Chromatography

Kerosene, the major constituent of oil -soluble im idazoline corrosion inhibitor, was determined by RP-HPLC external standard method on a SHIMPACK VPODS column(2mm × 1 5cm, ф5μm) with a mobile phase of methyl alcohol and acetic acid-ammonium aceta tebuffer solution(pH= 4), UV detector at245nm, column temperature 45℃, total flow 0.2mL/min and the max-pump pressure20MPa.The relative standard deviations were less than 2.0%, and the correlation coefficients were more than0.9990 with kerosene standard sample as external standard.The method wasn't only not to pretreatment sample, but shown to be fast, repetitive and accurate