Trace Determination Of Phthalate Esters In River Water Bysolvent Sublation Followed By High-performance Liquid chromatography-ultraviolet Detection

摘要

A novel method for separating and enriching trace phthalate esters (PAEs) in river water by solvent sublation and their determination by high-performance liquid chromatography (HPLC) has been developed. The optimal conditions of the solvent sublation were obtained, that is M-hexane as the sublation solvent, pH 7 of the solution, a nitrogen flow rate of 70 mL min~(-1) and sublation time of 70min. The floated product under the optimal conditions was determined by HPLC. In the process of HPLC analysis, an Eclipse XDB-C_(18) chromatographic column was used, and mobile phase consisted of acetonitrile and water using gradient elution, and the flow rate was 1.00 mL min~(-1). The proposed method was applied to determine eight PAEs in the river water from Fangshan District, Beijing; the recoveries ranged from 76.9 to 120.4%, RSD values from 2.63 to 9.71%, and limit of detection values ranged from 0.001 (for diethyl phthalate and butyl benzyl phthalate) to 0.225 μg L~(-1) (for dimethyl phthalate and dicyclohexyl phthalate).