Determination of Two Butendioic Acid Isomers by Reversed phase High performance Liquid Chromatography
A method for the determination of two butendioic acid isomers by reversed phase high performance liquid chromatography is described. cis Butendioic and trans butendioic acids were separated by Shim-pack CLC-ODS column, using methanol-water(5∶2 by volume)solution adjusted to pH 3.0 by phosphoric acid as a mobile phase with flow rate of 0.7 mL/min. The quantitative results are obtained by external standard method. The detection wavelength of 220 nm is applied for the samples. The detection limits are 0.1 mg/L and 0.075 mg/L(S/N=2), and relative standard deviations are 0.47% and 0.54%(n=3) for cis and trans butendioic acid, respectively. Linear range for both isomers is in 10~60 mg/L. The method is simple, rapid and sensitive, and was applied to determination of practical samples with satisfactory results.
High performance liquid chromatographycis Butendioic acidtrans Butendioic acidIsomer