Abstract
A sample pre-treatment method is described in which components are adsorbed on a micro pre-column, and an investigation of the method (with phthalic acid esters in water as sample components) is reported. The esters could be concentrated in the pre-column simply and rapidly, and were separated in a micro separation column. Concentrations of diethyl phthalate in the ppb-range were rapidly determined by pre-treatment of 10 ml or less of the aqueous solution. The method was suitable for use in micro-performance liquid chromatography.
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